Finding the Fourth Proportional to 7,229.86, 9,978.69 and 4,247.26

Step by Step Solution

1. Step 1: Write the proportion equation
   7,229.86 : 9,978.69 = 4,247.26 : x
2. Step 2: Convert to fraction form
   7,229.86/9,978.69 = 4,247.26/x
3. Step 3: Cross multiply
   7,229.86x = 9,978.69 × 4,247.26
4. Step 4: Simplify right side
   7,229.86x = 42,382,090.89
5. Step 5: Solve for x
   x = 42,382,090.89/7,229.86
6. Step 6: Final answer
   x = 5,862.09