Finding the Fourth Proportional to 10,218.15, 14,061.20 and 9,042.03

Step by Step Solution

1. Step 1: Write the proportion equation
   10,218.15 : 14,061.20 = 9,042.03 : x
2. Step 2: Convert to fraction form
   10,218.15/14,061.20 = 9,042.03/x
3. Step 3: Cross multiply
   10,218.15x = 14,061.20 × 9,042.03
4. Step 4: Simplify right side
   10,218.15x = 127,141,747.03
5. Step 5: Solve for x
   x = 127,141,747.03/10,218.15
6. Step 6: Final answer
   x = 12,442.74