Finding the Fourth Proportional to 265,285,778.69, 397,932,792.42 and 78,558,610.59

Step by Step Solution

1. Step 1: Write the proportion equation
   265,285,778.69 : 397,932,792.42 = 78,558,610.59 : x
2. Step 2: Convert to fraction form
   265,285,778.69/397,932,792.42 = 78,558,610.59/x
3. Step 3: Cross multiply
   265,285,778.69x = 397,932,792.42 × 78,558,610.59
4. Step 4: Simplify right side
   265,285,778.69x = 31,261,047,280,714,088
5. Step 5: Solve for x
   x = 31,261,047,280,714,088/265,285,778.69
6. Step 6: Final answer
   x = 117,839,137.23