Finding the Fourth Proportional to 16,640.28, 24,964.78 and 7,875

Step by Step Solution

1. Step 1: Write the proportion equation
   16,640.28 : 24,964.78 = 7,875 : x
2. Step 2: Convert to fraction form
   16,640.28/24,964.78 = 7,875/x
3. Step 3: Cross multiply
   16,640.28x = 24,964.78 × 7,875
4. Step 4: Simplify right side
   16,640.28x = 196,597,642.50
5. Step 5: Solve for x
   x = 196,597,642.50/16,640.28
6. Step 6: Final answer
   x = 11,814.56