Finding the Fourth Proportional to 14,145.19, 19,520.98 and 7,857.56

Step by Step Solution

1. Step 1: Write the proportion equation
   14,145.19 : 19,520.98 = 7,857.56 : x
2. Step 2: Convert to fraction form
   14,145.19/19,520.98 = 7,857.56/x
3. Step 3: Cross multiply
   14,145.19x = 19,520.98 × 7,857.56
4. Step 4: Simplify right side
   14,145.19x = 153,387,300.77
5. Step 5: Solve for x
   x = 153,387,300.77/14,145.19
6. Step 6: Final answer
   x = 10,843.78