Finding the Fourth Proportional to 2,085.72, 2,878.10 and 1,246.26

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085.72 : 2,878.10 = 1,246.26 : x
2. Step 2: Convert to fraction form
   2,085.72/2,878.10 = 1,246.26/x
3. Step 3: Cross multiply
   2,085.72x = 2,878.10 × 1,246.26
4. Step 4: Simplify right side
   2,085.72x = 3,586,864.02
5. Step 5: Solve for x
   x = 3,586,864.02/2,085.72
6. Step 6: Final answer
   x = 1,719.72