Finding the Fourth Proportional to 6,443.94, 9,658.42 and 5,275.92

Step by Step Solution

1. Step 1: Write the proportion equation
   6,443.94 : 9,658.42 = 5,275.92 : x
2. Step 2: Convert to fraction form
   6,443.94/9,658.42 = 5,275.92/x
3. Step 3: Cross multiply
   6,443.94x = 9,658.42 × 5,275.92
4. Step 4: Simplify right side
   6,443.94x = 50,957,051.25
5. Step 5: Solve for x
   x = 50,957,051.25/6,443.94
6. Step 6: Final answer
   x = 7,907.75