Finding the Fourth Proportional to 14,429.98, 19,913.34 and 8,142.31

Step by Step Solution

1. Step 1: Write the proportion equation
   14,429.98 : 19,913.34 = 8,142.31 : x
2. Step 2: Convert to fraction form
   14,429.98/19,913.34 = 8,142.31/x
3. Step 3: Cross multiply
   14,429.98x = 19,913.34 × 8,142.31
4. Step 4: Simplify right side
   14,429.98x = 162,140,587.42
5. Step 5: Solve for x
   x = 162,140,587.42/14,429.98
6. Step 6: Final answer
   x = 11,236.37