Finding the Fourth Proportional to 31,076.55, 42,885.54 and 17,647.20

Step by Step Solution

1. Step 1: Write the proportion equation
   31,076.55 : 42,885.54 = 17,647.20 : x
2. Step 2: Convert to fraction form
   31,076.55/42,885.54 = 17,647.20/x
3. Step 3: Cross multiply
   31,076.55x = 42,885.54 × 17,647.20
4. Step 4: Simplify right side
   31,076.55x = 756,809,701.49
5. Step 5: Solve for x
   x = 756,809,701.49/31,076.55
6. Step 6: Final answer
   x = 24,353.08