Finding the Fourth Proportional to 31,147.98, 46,728.12 and 11,426.72

Step by Step Solution

1. Step 1: Write the proportion equation
   31,147.98 : 46,728.12 = 11,426.72 : x
2. Step 2: Convert to fraction form
   31,147.98/46,728.12 = 11,426.72/x
3. Step 3: Cross multiply
   31,147.98x = 46,728.12 × 11,426.72
4. Step 4: Simplify right side
   31,147.98x = 533,949,143.37
5. Step 5: Solve for x
   x = 533,949,143.37/31,147.98
6. Step 6: Final answer
   x = 17,142.34