Finding the Fourth Proportional to 31,311.72, 46,968.51 and 9,124.62

Step by Step Solution

1. Step 1: Write the proportion equation
   31,311.72 : 46,968.51 = 9,124.62 : x
2. Step 2: Convert to fraction form
   31,311.72/46,968.51 = 9,124.62/x
3. Step 3: Cross multiply
   31,311.72x = 46,968.51 × 9,124.62
4. Step 4: Simplify right side
   31,311.72x = 428,569,805.72
5. Step 5: Solve for x
   x = 428,569,805.72/31,311.72
6. Step 6: Final answer
   x = 13,687.20