Finding the Fourth Proportional to 1,618.92, 2,426.25 and 886.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,618.92 : 2,426.25 = 886.89 : x
2. Step 2: Convert to fraction form
   1,618.92/2,426.25 = 886.89/x
3. Step 3: Cross multiply
   1,618.92x = 2,426.25 × 886.89
4. Step 4: Simplify right side
   1,618.92x = 2,151,816.86
5. Step 5: Solve for x
   x = 2,151,816.86/1,618.92
6. Step 6: Final answer
   x = 1,329.17