Finding the Fourth Proportional to 868,900,097.88, 1,199,123,128.85 and 492,563,979.59

Step by Step Solution

1. Step 1: Write the proportion equation
   868,900,097.88 : 1,199,123,128.85 = 492,563,979.59 : x
2. Step 2: Convert to fraction form
   868,900,097.88/1,199,123,128.85 = 492,563,979.59/x
3. Step 3: Cross multiply
   868,900,097.88x = 1,199,123,128.85 × 492,563,979.59
4. Step 4: Simplify right side
   868,900,097.88x = 590,644,860,356,309,888
5. Step 5: Solve for x
   x = 590,644,860,356,309,888/868,900,097.88
6. Step 6: Final answer
   x = 679,761,530.47