Finding the Fourth Proportional to 39,031.60, 58,505.42 and 16,855.42

Step by Step Solution

1. Step 1: Write the proportion equation
   39,031.60 : 58,505.42 = 16,855.42 : x
2. Step 2: Convert to fraction form
   39,031.60/58,505.42 = 16,855.42/x
3. Step 3: Cross multiply
   39,031.60x = 58,505.42 × 16,855.42
4. Step 4: Simplify right side
   39,031.60x = 986,133,426.38
5. Step 5: Solve for x
   x = 986,133,426.38/39,031.60
6. Step 6: Final answer
   x = 25,265.00