Finding the Fourth Proportional to 10,142.67, 15,216.17 and 4,299.15

Step by Step Solution

1. Step 1: Write the proportion equation
   10,142.67 : 15,216.17 = 4,299.15 : x
2. Step 2: Convert to fraction form
   10,142.67/15,216.17 = 4,299.15/x
3. Step 3: Cross multiply
   10,142.67x = 15,216.17 × 4,299.15
4. Step 4: Simplify right side
   10,142.67x = 65,416,575.76
5. Step 5: Solve for x
   x = 65,416,575.76/10,142.67
6. Step 6: Final answer
   x = 6,449.64