Finding the Fourth Proportional to 7,499.61, 10,349.28 and 4,142.75

Step by Step Solution

1. Step 1: Write the proportion equation
   7,499.61 : 10,349.28 = 4,142.75 : x
2. Step 2: Convert to fraction form
   7,499.61/10,349.28 = 4,142.75/x
3. Step 3: Cross multiply
   7,499.61x = 10,349.28 × 4,142.75
4. Step 4: Simplify right side
   7,499.61x = 42,874,427.97
5. Step 5: Solve for x
   x = 42,874,427.97/7,499.61
6. Step 6: Final answer
   x = 5,716.89