Finding the Fourth Proportional to 678,623,842.07, 1,019,468,111.32 and 402,456,192.06

Step by Step Solution

1. Step 1: Write the proportion equation
   678,623,842.07 : 1,019,468,111.32 = 402,456,192.06 : x
2. Step 2: Convert to fraction form
   678,623,842.07/1,019,468,111.32 = 402,456,192.06/x
3. Step 3: Cross multiply
   678,623,842.07x = 1,019,468,111.32 × 402,456,192.06
4. Step 4: Simplify right side
   678,623,842.07x = 410,291,254,010,499,648
5. Step 5: Solve for x
   x = 410,291,254,010,499,648/678,623,842.07
6. Step 6: Final answer
   x = 604,593,043.41