Finding the Fourth Proportional to 151,515,152.78, 209,090,819.56 and 81,900,535.71

Step by Step Solution

1. Step 1: Write the proportion equation
   151,515,152.78 : 209,090,819.56 = 81,900,535.71 : x
2. Step 2: Convert to fraction form
   151,515,152.78/209,090,819.56 = 81,900,535.71/x
3. Step 3: Cross multiply
   151,515,152.78x = 209,090,819.56 × 81,900,535.71
4. Step 4: Simplify right side
   151,515,152.78x = 17,124,650,134,006,946
5. Step 5: Solve for x
   x = 17,124,650,134,006,946/151,515,152.78
6. Step 6: Final answer
   x = 113,022,689.94