Finding the Fourth Proportional to 31,587.50, 47,365.39 and 10,520.10

Step by Step Solution

1. Step 1: Write the proportion equation
   31,587.50 : 47,365.39 = 10,520.10 : x
2. Step 2: Convert to fraction form
   31,587.50/47,365.39 = 10,520.10/x
3. Step 3: Cross multiply
   31,587.50x = 47,365.39 × 10,520.10
4. Step 4: Simplify right side
   31,587.50x = 498,288,639.34
5. Step 5: Solve for x
   x = 498,288,639.34/31,587.50
6. Step 6: Final answer
   x = 15,774.87