Finding the Fourth Proportional to 31,110.34, 42,931.20 and 17,681.36

Step by Step Solution

1. Step 1: Write the proportion equation
   31,110.34 : 42,931.20 = 17,681.36 : x
2. Step 2: Convert to fraction form
   31,110.34/42,931.20 = 17,681.36/x
3. Step 3: Cross multiply
   31,110.34x = 42,931.20 × 17,681.36
4. Step 4: Simplify right side
   31,110.34x = 759,082,002.43
5. Step 5: Solve for x
   x = 759,082,002.43/31,110.34
6. Step 6: Final answer
   x = 24,399.67