Finding the Fourth Proportional to 23,731.76, 32,748.56 and 13,120.72

Step by Step Solution

1. Step 1: Write the proportion equation
   23,731.76 : 32,748.56 = 13,120.72 : x
2. Step 2: Convert to fraction form
   23,731.76/32,748.56 = 13,120.72/x
3. Step 3: Cross multiply
   23,731.76x = 32,748.56 × 13,120.72
4. Step 4: Simplify right side
   23,731.76x = 429,684,686.16
5. Step 5: Solve for x
   x = 429,684,686.16/23,731.76
6. Step 6: Final answer
   x = 18,105.89