Finding the Fourth Proportional to 31,069.54, 42,877.04 and 17,640.34

Step by Step Solution

1. Step 1: Write the proportion equation
   31,069.54 : 42,877.04 = 17,640.34 : x
2. Step 2: Convert to fraction form
   31,069.54/42,877.04 = 17,640.34/x
3. Step 3: Cross multiply
   31,069.54x = 42,877.04 × 17,640.34
4. Step 4: Simplify right side
   31,069.54x = 756,365,563.79
5. Step 5: Solve for x
   x = 756,365,563.79/31,069.54
6. Step 6: Final answer
   x = 24,344.28