Finding the Fourth Proportional to 31,425.11, 47,150.72 and 12,718.37

Step by Step Solution

1. Step 1: Write the proportion equation
   31,425.11 : 47,150.72 = 12,718.37 : x
2. Step 2: Convert to fraction form
   31,425.11/47,150.72 = 12,718.37/x
3. Step 3: Cross multiply
   31,425.11x = 47,150.72 × 12,718.37
4. Step 4: Simplify right side
   31,425.11x = 599,680,302.73
5. Step 5: Solve for x
   x = 599,680,302.73/31,425.11
6. Step 6: Final answer
   x = 19,082.84