Finding the Fourth Proportional to 17,870.28, 24,660.72 and 9,912.36

Step by Step Solution

1. Step 1: Write the proportion equation
   17,870.28 : 24,660.72 = 9,912.36 : x
2. Step 2: Convert to fraction form
   17,870.28/24,660.72 = 9,912.36/x
3. Step 3: Cross multiply
   17,870.28x = 24,660.72 × 9,912.36
4. Step 4: Simplify right side
   17,870.28x = 244,445,934.50
5. Step 5: Solve for x
   x = 244,445,934.50/17,870.28
6. Step 6: Final answer
   x = 13,678.91