Finding the Fourth Proportional to 31,402.72, 43,336.72 and 17,256

Step by Step Solution

1. Step 1: Write the proportion equation
   31,402.72 : 43,336.72 = 17,256 : x
2. Step 2: Convert to fraction form
   31,402.72/43,336.72 = 17,256/x
3. Step 3: Cross multiply
   31,402.72x = 43,336.72 × 17,256
4. Step 4: Simplify right side
   31,402.72x = 747,818,440.32
5. Step 5: Solve for x
   x = 747,818,440.32/31,402.72
6. Step 6: Final answer
   x = 23,813.81