Finding the Fourth Proportional to 688,822,061.01, 950,547,064.55 and 406,655,392.79

Step by Step Solution

1. Step 1: Write the proportion equation
   688,822,061.01 : 950,547,064.55 = 406,655,392.79 : x
2. Step 2: Convert to fraction form
   688,822,061.01/950,547,064.55 = 406,655,392.79/x
3. Step 3: Cross multiply
   688,822,061.01x = 950,547,064.55 × 406,655,392.79
4. Step 4: Simplify right side
   688,822,061.01x = 386,545,089,893,175,744
5. Step 5: Solve for x
   x = 386,545,089,893,175,744/688,822,061.01
6. Step 6: Final answer
   x = 561,168,278.10