Finding the Fourth Proportional to 2,087.57, 3,132.08 and 1,308.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,087.57 : 3,132.08 = 1,308.15 : x
2. Step 2: Convert to fraction form
   2,087.57/3,132.08 = 1,308.15/x
3. Step 3: Cross multiply
   2,087.57x = 3,132.08 × 1,308.15
4. Step 4: Simplify right side
   2,087.57x = 4,097,230.45
5. Step 5: Solve for x
   x = 4,097,230.45/2,087.57
6. Step 6: Final answer
   x = 1,962.68