Finding the Fourth Proportional to 1,240,456,158,866.50, 1,860,687,729,022.50 and 475,778,705,987.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,240,456,158,866.50 : 1,860,687,729,022.50 = 475,778,705,987.10 : x
2. Step 2: Convert to fraction form
   1,240,456,158,866.50/1,860,687,729,022.50 = 475,778,705,987.10/x
3. Step 3: Cross multiply
   1,240,456,158,866.50x = 1,860,687,729,022.50 × 475,778,705,987.10
4. Step 4: Simplify right side
   1,240,456,158,866.50x = 885,275,599,960,400,791,076,864
5. Step 5: Solve for x
   x = 885,275,599,960,400,791,076,864/1,240,456,158,866.50
6. Step 6: Final answer
   x = 713,669,397,852.28