Finding the Fourth Proportional to 14,085.36, 21,131.28 and 7,158.24

Step by Step Solution

1. Step 1: Write the proportion equation
   14,085.36 : 21,131.28 = 7,158.24 : x
2. Step 2: Convert to fraction form
   14,085.36/21,131.28 = 7,158.24/x
3. Step 3: Cross multiply
   14,085.36x = 21,131.28 × 7,158.24
4. Step 4: Simplify right side
   14,085.36x = 151,262,773.75
5. Step 5: Solve for x
   x = 151,262,773.75/14,085.36
6. Step 6: Final answer
   x = 10,739.01