Finding the Fourth Proportional to 123,492.52, 185,311.50 and 85,571.56

Step by Step Solution

1. Step 1: Write the proportion equation
   123,492.52 : 185,311.50 = 85,571.56 : x
2. Step 2: Convert to fraction form
   123,492.52/185,311.50 = 85,571.56/x
3. Step 3: Cross multiply
   123,492.52x = 185,311.50 × 85,571.56
4. Step 4: Simplify right side
   123,492.52x = 15,857,394,140.94
5. Step 5: Solve for x
   x = 15,857,394,140.94/123,492.52
6. Step 6: Final answer
   x = 128,407.73