Finding the Fourth Proportional to 17,921.55, 24,731.78 and 9,964.06

Step by Step Solution

1. Step 1: Write the proportion equation
   17,921.55 : 24,731.78 = 9,964.06 : x
2. Step 2: Convert to fraction form
   17,921.55/24,731.78 = 9,964.06/x
3. Step 3: Cross multiply
   17,921.55x = 24,731.78 × 9,964.06
4. Step 4: Simplify right side
   17,921.55x = 246,429,023.34
5. Step 5: Solve for x
   x = 246,429,023.34/17,921.55
6. Step 6: Final answer
   x = 13,750.43