Finding the Fourth Proportional to 14,145.57, 19,521.48 and 7,857.96

Step by Step Solution

1. Step 1: Write the proportion equation
   14,145.57 : 19,521.48 = 7,857.96 : x
2. Step 2: Convert to fraction form
   14,145.57/19,521.48 = 7,857.96/x
3. Step 3: Cross multiply
   14,145.57x = 19,521.48 × 7,857.96
4. Step 4: Simplify right side
   14,145.57x = 153,399,008.98
5. Step 5: Solve for x
   x = 153,399,008.98/14,145.57
6. Step 6: Final answer
   x = 10,844.31