Finding the Fourth Proportional to 3,915.88, 5,901.27 and 3,669.80

Step by Step Solution

1. Step 1: Write the proportion equation
   3,915.88 : 5,901.27 = 3,669.80 : x
2. Step 2: Convert to fraction form
   3,915.88/5,901.27 = 3,669.80/x
3. Step 3: Cross multiply
   3,915.88x = 5,901.27 × 3,669.80
4. Step 4: Simplify right side
   3,915.88x = 21,656,480.65
5. Step 5: Solve for x
   x = 21,656,480.65/3,915.88
6. Step 6: Final answer
   x = 5,530.42