Finding the Fourth Proportional to 1,085.22, 1,497.15 and 712.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,085.22 : 1,497.15 = 712.62 : x
2. Step 2: Convert to fraction form
   1,085.22/1,497.15 = 712.62/x
3. Step 3: Cross multiply
   1,085.22x = 1,497.15 × 712.62
4. Step 4: Simplify right side
   1,085.22x = 1,066,899.03
5. Step 5: Solve for x
   x = 1,066,899.03/1,085.22
6. Step 6: Final answer
   x = 983.12