Finding the Fourth Proportional to 1,123,298,612.50, 1,685,177,725.98 and 386,272,799.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123,298,612.50 : 1,685,177,725.98 = 386,272,799.10 : x
2. Step 2: Convert to fraction form
   1,123,298,612.50/1,685,177,725.98 = 386,272,799.10/x
3. Step 3: Cross multiply
   1,123,298,612.50x = 1,685,177,725.98 × 386,272,799.10
4. Step 4: Simplify right side
   1,123,298,612.50x = 650,938,317,195,267,456
5. Step 5: Solve for x
   x = 650,938,317,195,267,456/1,123,298,612.50
6. Step 6: Final answer
   x = 579,488,223.30