Finding the Fourth Proportional to 12,061.52, 18,120.08 and 11,563.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,061.52 : 18,120.08 = 11,563.30 : x
2. Step 2: Convert to fraction form
   12,061.52/18,120.08 = 11,563.30/x
3. Step 3: Cross multiply
   12,061.52x = 18,120.08 × 11,563.30
4. Step 4: Simplify right side
   12,061.52x = 209,527,904.67
5. Step 5: Solve for x
   x = 209,527,904.67/12,061.52
6. Step 6: Final answer
   x = 17,371.61