Finding the Fourth Proportional to 31,951.62, 47,920.83 and 8,572.50

Step by Step Solution

1. Step 1: Write the proportion equation
   31,951.62 : 47,920.83 = 8,572.50 : x
2. Step 2: Convert to fraction form
   31,951.62/47,920.83 = 8,572.50/x
3. Step 3: Cross multiply
   31,951.62x = 47,920.83 × 8,572.50
4. Step 4: Simplify right side
   31,951.62x = 410,801,315.18
5. Step 5: Solve for x
   x = 410,801,315.18/31,951.62
6. Step 6: Final answer
   x = 12,856.98