Finding the Fourth Proportional to 17,139.30, 25,684.85 and 8,123.84

Step by Step Solution

1. Step 1: Write the proportion equation
   17,139.30 : 25,684.85 = 8,123.84 : x
2. Step 2: Convert to fraction form
   17,139.30/25,684.85 = 8,123.84/x
3. Step 3: Cross multiply
   17,139.30x = 25,684.85 × 8,123.84
4. Step 4: Simplify right side
   17,139.30x = 208,659,442.78
5. Step 5: Solve for x
   x = 208,659,442.78/17,139.30
6. Step 6: Final answer
   x = 12,174.33