Finding the Fourth Proportional to 1,086.26, 1,499.25 and 712.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086.26 : 1,499.25 = 712.58 : x
2. Step 2: Convert to fraction form
   1,086.26/1,499.25 = 712.58/x
3. Step 3: Cross multiply
   1,086.26x = 1,499.25 × 712.58
4. Step 4: Simplify right side
   1,086.26x = 1,068,328.07
5. Step 5: Solve for x
   x = 1,068,328.07/1,086.26
6. Step 6: Final answer
   x = 983.50