Finding the Fourth Proportional to 3,915.72, 5,880.60 and 3,759.12

Step by Step Solution

1. Step 1: Write the proportion equation
   3,915.72 : 5,880.60 = 3,759.12 : x
2. Step 2: Convert to fraction form
   3,915.72/5,880.60 = 3,759.12/x
3. Step 3: Cross multiply
   3,915.72x = 5,880.60 × 3,759.12
4. Step 4: Simplify right side
   3,915.72x = 22,105,881.07
5. Step 5: Solve for x
   x = 22,105,881.07/3,915.72
6. Step 6: Final answer
   x = 5,645.42