Finding the Fourth Proportional to 14,242.57, 19,653.07 and 7,868.78

Step by Step Solution

1. Step 1: Write the proportion equation
   14,242.57 : 19,653.07 = 7,868.78 : x
2. Step 2: Convert to fraction form
   14,242.57/19,653.07 = 7,868.78/x
3. Step 3: Cross multiply
   14,242.57x = 19,653.07 × 7,868.78
4. Step 4: Simplify right side
   14,242.57x = 154,645,743.12
5. Step 5: Solve for x
   x = 154,645,743.12/14,242.57
6. Step 6: Final answer
   x = 10,857.99