Finding the Fourth Proportional to 9,423.90, 14,139.45 and 9,276.30

Step by Step Solution

1. Step 1: Write the proportion equation
   9,423.90 : 14,139.45 = 9,276.30 : x
2. Step 2: Convert to fraction form
   9,423.90/14,139.45 = 9,276.30/x
3. Step 3: Cross multiply
   9,423.90x = 14,139.45 × 9,276.30
4. Step 4: Simplify right side
   9,423.90x = 131,161,780.04
5. Step 5: Solve for x
   x = 131,161,780.04/9,423.90
6. Step 6: Final answer
   x = 13,917.99