Finding the Fourth Proportional to 31,398.84, 47,105.55 and 9,211.32

Step by Step Solution

1. Step 1: Write the proportion equation
   31,398.84 : 47,105.55 = 9,211.32 : x
2. Step 2: Convert to fraction form
   31,398.84/47,105.55 = 9,211.32/x
3. Step 3: Cross multiply
   31,398.84x = 47,105.55 × 9,211.32
4. Step 4: Simplify right side
   31,398.84x = 433,904,294.83
5. Step 5: Solve for x
   x = 433,904,294.83/31,398.84
6. Step 6: Final answer
   x = 13,819.12