Finding the Fourth Proportional to 31,908.83, 47,870.15 and 9,721.62

Step by Step Solution

1. Step 1: Write the proportion equation
   31,908.83 : 47,870.15 = 9,721.62 : x
2. Step 2: Convert to fraction form
   31,908.83/47,870.15 = 9,721.62/x
3. Step 3: Cross multiply
   31,908.83x = 47,870.15 × 9,721.62
4. Step 4: Simplify right side
   31,908.83x = 465,375,359.03
5. Step 5: Solve for x
   x = 465,375,359.03/31,908.83
6. Step 6: Final answer
   x = 14,584.53