Finding the Fourth Proportional to 3,915.66, 5,870.10 and 3,698.22

Step by Step Solution

1. Step 1: Write the proportion equation
   3,915.66 : 5,870.10 = 3,698.22 : x
2. Step 2: Convert to fraction form
   3,915.66/5,870.10 = 3,698.22/x
3. Step 3: Cross multiply
   3,915.66x = 5,870.10 × 3,698.22
4. Step 4: Simplify right side
   3,915.66x = 21,708,921.22
5. Step 5: Solve for x
   x = 21,708,921.22/3,915.66
6. Step 6: Final answer
   x = 5,544.13