Finding the Fourth Proportional to 31,128.09, 42,956.96 and 17,699.37

Step by Step Solution

1. Step 1: Write the proportion equation
   31,128.09 : 42,956.96 = 17,699.37 : x
2. Step 2: Convert to fraction form
   31,128.09/42,956.96 = 17,699.37/x
3. Step 3: Cross multiply
   31,128.09x = 42,956.96 × 17,699.37
4. Step 4: Simplify right side
   31,128.09x = 760,311,040.62
5. Step 5: Solve for x
   x = 760,311,040.62/31,128.09
6. Step 6: Final answer
   x = 24,425.24