Finding the Fourth Proportional to 9,758.50, 14,639.60 and 3,915.57

Step by Step Solution

1. Step 1: Write the proportion equation
   9,758.50 : 14,639.60 = 3,915.57 : x
2. Step 2: Convert to fraction form
   9,758.50/14,639.60 = 3,915.57/x
3. Step 3: Cross multiply
   9,758.50x = 14,639.60 × 3,915.57
4. Step 4: Simplify right side
   9,758.50x = 57,322,378.57
5. Step 5: Solve for x
   x = 57,322,378.57/9,758.50
6. Step 6: Final answer
   x = 5,874.10