Finding the Fourth Proportional to 2,088.86, 3,130.59 and 854.85

Step by Step Solution

1. Step 1: Write the proportion equation
   2,088.86 : 3,130.59 = 854.85 : x
2. Step 2: Convert to fraction form
   2,088.86/3,130.59 = 854.85/x
3. Step 3: Cross multiply
   2,088.86x = 3,130.59 × 854.85
4. Step 4: Simplify right side
   2,088.86x = 2,676,184.86
5. Step 5: Solve for x
   x = 2,676,184.86/2,088.86
6. Step 6: Final answer
   x = 1,281.17