Finding the Fourth Proportional to 351,930.83, 527,886.00 and 85,687.50

Step by Step Solution

1. Step 1: Write the proportion equation
   351,930.83 : 527,886.00 = 85,687.50 : x
2. Step 2: Convert to fraction form
   351,930.83/527,886.00 = 85,687.50/x
3. Step 3: Cross multiply
   351,930.83x = 527,886.00 × 85,687.50
4. Step 4: Simplify right side
   351,930.83x = 45,233,231,196.56
5. Step 5: Solve for x
   x = 45,233,231,196.56/351,930.83
6. Step 6: Final answer
   x = 128,528.75