Finding the Fourth Proportional to 31,086.30, 42,897.48 and 17,655.78

Step by Step Solution

1. Step 1: Write the proportion equation
   31,086.30 : 42,897.48 = 17,655.78 : x
2. Step 2: Convert to fraction form
   31,086.30/42,897.48 = 17,655.78/x
3. Step 3: Cross multiply
   31,086.30x = 42,897.48 × 17,655.78
4. Step 4: Simplify right side
   31,086.30x = 757,388,469.43
5. Step 5: Solve for x
   x = 757,388,469.43/31,086.30
6. Step 6: Final answer
   x = 24,364.06