Finding the Fourth Proportional to 31,128.36, 42,956.94 and 17,699.61

Step by Step Solution

1. Step 1: Write the proportion equation
   31,128.36 : 42,956.94 = 17,699.61 : x
2. Step 2: Convert to fraction form
   31,128.36/42,956.94 = 17,699.61/x
3. Step 3: Cross multiply
   31,128.36x = 42,956.94 × 17,699.61
4. Step 4: Simplify right side
   31,128.36x = 760,321,119.10
5. Step 5: Solve for x
   x = 760,321,119.10/31,128.36
6. Step 6: Final answer
   x = 24,425.35