Finding the Fourth Proportional to 2,085.29, 2,878.25 and 1,298.87

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085.29 : 2,878.25 = 1,298.87 : x
2. Step 2: Convert to fraction form
   2,085.29/2,878.25 = 1,298.87/x
3. Step 3: Cross multiply
   2,085.29x = 2,878.25 × 1,298.87
4. Step 4: Simplify right side
   2,085.29x = 3,738,451.69
5. Step 5: Solve for x
   x = 3,738,451.69/2,085.29
6. Step 6: Final answer
   x = 1,792.78