Finding the Fourth Proportional to 31,498.92, 47,215.98 and 13,977

Step by Step Solution

1. Step 1: Write the proportion equation
   31,498.92 : 47,215.98 = 13,977 : x
2. Step 2: Convert to fraction form
   31,498.92/47,215.98 = 13,977/x
3. Step 3: Cross multiply
   31,498.92x = 47,215.98 × 13,977
4. Step 4: Simplify right side
   31,498.92x = 659,937,752.46
5. Step 5: Solve for x
   x = 659,937,752.46/31,498.92
6. Step 6: Final answer
   x = 20,951.12