Finding the Fourth Proportional to 31,406.28, 43,340.72 and 17,259.96

Step by Step Solution

1. Step 1: Write the proportion equation
   31,406.28 : 43,340.72 = 17,259.96 : x
2. Step 2: Convert to fraction form
   31,406.28/43,340.72 = 17,259.96/x
3. Step 3: Cross multiply
   31,406.28x = 43,340.72 × 17,259.96
4. Step 4: Simplify right side
   31,406.28x = 748,059,093.57
5. Step 5: Solve for x
   x = 748,059,093.57/31,406.28
6. Step 6: Final answer
   x = 23,818.77