Finding the Fourth Proportional to 31,085.18, 42,898.54 and 17,655.64

Step by Step Solution

1. Step 1: Write the proportion equation
   31,085.18 : 42,898.54 = 17,655.64 : x
2. Step 2: Convert to fraction form
   31,085.18/42,898.54 = 17,655.64/x
3. Step 3: Cross multiply
   31,085.18x = 42,898.54 × 17,655.64
4. Step 4: Simplify right side
   31,085.18x = 757,401,060.48
5. Step 5: Solve for x
   x = 757,401,060.48/31,085.18
6. Step 6: Final answer
   x = 24,365.34