Finding the Fourth Proportional to 1,085.10, 1,625.82 and 868.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,085.10 : 1,625.82 = 868.22 : x
2. Step 2: Convert to fraction form
   1,085.10/1,625.82 = 868.22/x
3. Step 3: Cross multiply
   1,085.10x = 1,625.82 × 868.22
4. Step 4: Simplify right side
   1,085.10x = 1,411,569.04
5. Step 5: Solve for x
   x = 1,411,569.04/1,085.10
6. Step 6: Final answer
   x = 1,300.87