Finding the Fourth Proportional to 31,616.10, 47,417.69 and 11,618.71

Step by Step Solution

1. Step 1: Write the proportion equation
   31,616.10 : 47,417.69 = 11,618.71 : x
2. Step 2: Convert to fraction form
   31,616.10/47,417.69 = 11,618.71/x
3. Step 3: Cross multiply
   31,616.10x = 47,417.69 × 11,618.71
4. Step 4: Simplify right side
   31,616.10x = 550,932,299.48
5. Step 5: Solve for x
   x = 550,932,299.48/31,616.10
6. Step 6: Final answer
   x = 17,425.69