Finding the Fourth Proportional to 14,429.42, 21,655.47 and 7,409.15

Step by Step Solution

1. Step 1: Write the proportion equation
   14,429.42 : 21,655.47 = 7,409.15 : x
2. Step 2: Convert to fraction form
   14,429.42/21,655.47 = 7,409.15/x
3. Step 3: Cross multiply
   14,429.42x = 21,655.47 × 7,409.15
4. Step 4: Simplify right side
   14,429.42x = 160,448,625.55
5. Step 5: Solve for x
   x = 160,448,625.55/14,429.42
6. Step 6: Final answer
   x = 11,119.55