Finding the Fourth Proportional to 1,085.93, 1,498.22 and 687.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,085.93 : 1,498.22 = 687.49 : x
2. Step 2: Convert to fraction form
   1,085.93/1,498.22 = 687.49/x
3. Step 3: Cross multiply
   1,085.93x = 1,498.22 × 687.49
4. Step 4: Simplify right side
   1,085.93x = 1,030,004.08
5. Step 5: Solve for x
   x = 1,030,004.08/1,085.93
6. Step 6: Final answer
   x = 948.50