Finding the Fourth Proportional to 14,429.86, 19,913.25 and 8,142.10

Step by Step Solution

1. Step 1: Write the proportion equation
   14,429.86 : 19,913.25 = 8,142.10 : x
2. Step 2: Convert to fraction form
   14,429.86/19,913.25 = 8,142.10/x
3. Step 3: Cross multiply
   14,429.86x = 19,913.25 × 8,142.10
4. Step 4: Simplify right side
   14,429.86x = 162,135,672.83
5. Step 5: Solve for x
   x = 162,135,672.83/14,429.86
6. Step 6: Final answer
   x = 11,236.12