Finding the Fourth Proportional to 2,087.69, 3,132.45 and 917.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,087.69 : 3,132.45 = 917.10 : x
2. Step 2: Convert to fraction form
   2,087.69/3,132.45 = 917.10/x
3. Step 3: Cross multiply
   2,087.69x = 3,132.45 × 917.10
4. Step 4: Simplify right side
   2,087.69x = 2,872,769.90
5. Step 5: Solve for x
   x = 2,872,769.90/2,087.69
6. Step 6: Final answer
   x = 1,376.06