Finding the Fourth Proportional to 12,423.90, 17,135.76 and 9,016.05

Step by Step Solution

1. Step 1: Write the proportion equation
   12,423.90 : 17,135.76 = 9,016.05 : x
2. Step 2: Convert to fraction form
   12,423.90/17,135.76 = 9,016.05/x
3. Step 3: Cross multiply
   12,423.90x = 17,135.76 × 9,016.05
4. Step 4: Simplify right side
   12,423.90x = 154,496,868.95
5. Step 5: Solve for x
   x = 154,496,868.95/12,423.90
6. Step 6: Final answer
   x = 12,435.46