Finding the Fourth Proportional to 12,038.12, 18,061.50 and 7,415.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,038.12 : 18,061.50 = 7,415.72 : x
2. Step 2: Convert to fraction form
   12,038.12/18,061.50 = 7,415.72/x
3. Step 3: Cross multiply
   12,038.12x = 18,061.50 × 7,415.72
4. Step 4: Simplify right side
   12,038.12x = 133,939,026.78
5. Step 5: Solve for x
   x = 133,939,026.78/12,038.12
6. Step 6: Final answer
   x = 11,126.24