Finding the Fourth Proportional to 23,471.64, 32,391.50 and 12,861.72

Step by Step Solution

1. Step 1: Write the proportion equation
   23,471.64 : 32,391.50 = 12,861.72 : x
2. Step 2: Convert to fraction form
   23,471.64/32,391.50 = 12,861.72/x
3. Step 3: Cross multiply
   23,471.64x = 32,391.50 × 12,861.72
4. Step 4: Simplify right side
   23,471.64x = 416,610,339.07
5. Step 5: Solve for x
   x = 416,610,339.07/23,471.64
6. Step 6: Final answer
   x = 17,749.52