Finding the Fourth Proportional to 31,052.78, 42,845.55 and 17,621

Step by Step Solution

1. Step 1: Write the proportion equation
   31,052.78 : 42,845.55 = 17,621 : x
2. Step 2: Convert to fraction form
   31,052.78/42,845.55 = 17,621/x
3. Step 3: Cross multiply
   31,052.78x = 42,845.55 × 17,621
4. Step 4: Simplify right side
   31,052.78x = 754,981,436.55
5. Step 5: Solve for x
   x = 754,981,436.55/31,052.78
6. Step 6: Final answer
   x = 24,312.85