Finding the Fourth Proportional to 7,443.31, 10,272.38 and 4,086.78

Step by Step Solution

1. Step 1: Write the proportion equation
   7,443.31 : 10,272.38 = 4,086.78 : x
2. Step 2: Convert to fraction form
   7,443.31/10,272.38 = 4,086.78/x
3. Step 3: Cross multiply
   7,443.31x = 10,272.38 × 4,086.78
4. Step 4: Simplify right side
   7,443.31x = 41,980,957.14
5. Step 5: Solve for x
   x = 41,980,957.14/7,443.31
6. Step 6: Final answer
   x = 5,640.09