Finding the Fourth Proportional to 31,406.10, 43,340.42 and 17,259.86

Step by Step Solution

1. Step 1: Write the proportion equation
   31,406.10 : 43,340.42 = 17,259.86 : x
2. Step 2: Convert to fraction form
   31,406.10/43,340.42 = 17,259.86/x
3. Step 3: Cross multiply
   31,406.10x = 43,340.42 × 17,259.86
4. Step 4: Simplify right side
   31,406.10x = 748,049,581.54
5. Step 5: Solve for x
   x = 748,049,581.54/31,406.10
6. Step 6: Final answer
   x = 23,818.61