Finding the Fourth Proportional to 31,128.26, 42,956.05 and 17,517.06

Step by Step Solution

1. Step 1: Write the proportion equation
   31,128.26 : 42,956.05 = 17,517.06 : x
2. Step 2: Convert to fraction form
   31,128.26/42,956.05 = 17,517.06/x
3. Step 3: Cross multiply
   31,128.26x = 42,956.05 × 17,517.06
4. Step 4: Simplify right side
   31,128.26x = 752,463,597.82
5. Step 5: Solve for x
   x = 752,463,597.82/31,128.26
6. Step 6: Final answer
   x = 24,173.01