Finding the Fourth Proportional to 9,760.64, 14,644.16 and 3,915.68

Step by Step Solution

1. Step 1: Write the proportion equation
   9,760.64 : 14,644.16 = 3,915.68 : x
2. Step 2: Convert to fraction form
   9,760.64/14,644.16 = 3,915.68/x
3. Step 3: Cross multiply
   9,760.64x = 14,644.16 × 3,915.68
4. Step 4: Simplify right side
   9,760.64x = 57,341,844.43
5. Step 5: Solve for x
   x = 57,341,844.43/9,760.64
6. Step 6: Final answer
   x = 5,874.80