Finding the Fourth Proportional to 6,892.40, 9,510.72 and 3,907.64

Step by Step Solution

1. Step 1: Write the proportion equation
   6,892.40 : 9,510.72 = 3,907.64 : x
2. Step 2: Convert to fraction form
   6,892.40/9,510.72 = 3,907.64/x
3. Step 3: Cross multiply
   6,892.40x = 9,510.72 × 3,907.64
4. Step 4: Simplify right side
   6,892.40x = 37,164,469.90
5. Step 5: Solve for x
   x = 37,164,469.90/6,892.40
6. Step 6: Final answer
   x = 5,392.09