Finding the Fourth Proportional to 12,042.72, 18,063.48 and 7,047.90

Step by Step Solution

1. Step 1: Write the proportion equation
   12,042.72 : 18,063.48 = 7,047.90 : x
2. Step 2: Convert to fraction form
   12,042.72/18,063.48 = 7,047.90/x
3. Step 3: Cross multiply
   12,042.72x = 18,063.48 × 7,047.90
4. Step 4: Simplify right side
   12,042.72x = 127,309,600.69
5. Step 5: Solve for x
   x = 127,309,600.69/12,042.72
6. Step 6: Final answer
   x = 10,571.50