Finding the Fourth Proportional to 7,499.20, 10,348.90 and 4,142.15

Step by Step Solution

1. Step 1: Write the proportion equation
   7,499.20 : 10,348.90 = 4,142.15 : x
2. Step 2: Convert to fraction form
   7,499.20/10,348.90 = 4,142.15/x
3. Step 3: Cross multiply
   7,499.20x = 10,348.90 × 4,142.15
4. Step 4: Simplify right side
   7,499.20x = 42,866,696.14
5. Step 5: Solve for x
   x = 42,866,696.14/7,499.20
6. Step 6: Final answer
   x = 5,716.17