Finding the Fourth Proportional to 151,345,492.32, 208,856,775.78 and 81,730,867.50

Step by Step Solution

1. Step 1: Write the proportion equation
   151,345,492.32 : 208,856,775.78 = 81,730,867.50 : x
2. Step 2: Convert to fraction form
   151,345,492.32/208,856,775.78 = 81,730,867.50/x
3. Step 3: Cross multiply
   151,345,492.32x = 208,856,775.78 × 81,730,867.50
4. Step 4: Simplify right side
   151,345,492.32x = 17,070,045,467,752,390
5. Step 5: Solve for x
   x = 17,070,045,467,752,390/151,345,492.32
6. Step 6: Final answer
   x = 112,788,595.19