Finding the Fourth Proportional to 31,124.72, 46,660.98 and 13,581.20

Step by Step Solution

1. Step 1: Write the proportion equation
   31,124.72 : 46,660.98 = 13,581.20 : x
2. Step 2: Convert to fraction form
   31,124.72/46,660.98 = 13,581.20/x
3. Step 3: Cross multiply
   31,124.72x = 46,660.98 × 13,581.20
4. Step 4: Simplify right side
   31,124.72x = 633,712,101.58
5. Step 5: Solve for x
   x = 633,712,101.58/31,124.72
6. Step 6: Final answer
   x = 20,360.41