Finding the Fourth Proportional to 479,578,978.62, 661,835,038.41 and 293,904,136.62

Step by Step Solution

1. Step 1: Write the proportion equation
   479,578,978.62 : 661,835,038.41 = 293,904,136.62 : x
2. Step 2: Convert to fraction form
   479,578,978.62/661,835,038.41 = 293,904,136.62/x
3. Step 3: Cross multiply
   479,578,978.62x = 661,835,038.41 × 293,904,136.62
4. Step 4: Simplify right side
   479,578,978.62x = 194,516,055,548,755,584
5. Step 5: Solve for x
   x = 194,516,055,548,755,584/479,578,978.62
6. Step 6: Final answer
   x = 405,597,543.30