Finding the Fourth Proportional to 31,395.62, 47,100.69 and 9,209.18

Step by Step Solution

1. Step 1: Write the proportion equation
   31,395.62 : 47,100.69 = 9,209.18 : x
2. Step 2: Convert to fraction form
   31,395.62/47,100.69 = 9,209.18/x
3. Step 3: Cross multiply
   31,395.62x = 47,100.69 × 9,209.18
4. Step 4: Simplify right side
   31,395.62x = 433,758,732.33
5. Step 5: Solve for x
   x = 433,758,732.33/31,395.62
6. Step 6: Final answer
   x = 13,815.90