Finding the Fourth Proportional to 10,099.26, 15,111.82 and 8,429.24

Step by Step Solution

1. Step 1: Write the proportion equation
   10,099.26 : 15,111.82 = 8,429.24 : x
2. Step 2: Convert to fraction form
   10,099.26/15,111.82 = 8,429.24/x
3. Step 3: Cross multiply
   10,099.26x = 15,111.82 × 8,429.24
4. Step 4: Simplify right side
   10,099.26x = 127,381,157.62
5. Step 5: Solve for x
   x = 127,381,157.62/10,099.26
6. Step 6: Final answer
   x = 12,612.92