Finding the Fourth Proportional to 31,713.56, 43,773.72 and 19,139.12

Step by Step Solution

1. Step 1: Write the proportion equation
   31,713.56 : 43,773.72 = 19,139.12 : x
2. Step 2: Convert to fraction form
   31,713.56/43,773.72 = 19,139.12/x
3. Step 3: Cross multiply
   31,713.56x = 43,773.72 × 19,139.12
4. Step 4: Simplify right side
   31,713.56x = 837,790,479.93
5. Step 5: Solve for x
   x = 837,790,479.93/31,713.56
6. Step 6: Final answer
   x = 26,417.42