Finding the Fourth Proportional to 31,816.72, 47,727.42 and 8,443

Step by Step Solution

1. Step 1: Write the proportion equation
   31,816.72 : 47,727.42 = 8,443 : x
2. Step 2: Convert to fraction form
   31,816.72/47,727.42 = 8,443/x
3. Step 3: Cross multiply
   31,816.72x = 47,727.42 × 8,443
4. Step 4: Simplify right side
   31,816.72x = 402,962,607.06
5. Step 5: Solve for x
   x = 402,962,607.06/31,816.72
6. Step 6: Final answer
   x = 12,665.12