Finding the Fourth Proportional to 1,085.47, 1,498.08 and 712.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,085.47 : 1,498.08 = 712.76 : x
2. Step 2: Convert to fraction form
   1,085.47/1,498.08 = 712.76/x
3. Step 3: Cross multiply
   1,085.47x = 1,498.08 × 712.76
4. Step 4: Simplify right side
   1,085.47x = 1,067,771.50
5. Step 5: Solve for x
   x = 1,067,771.50/1,085.47
6. Step 6: Final answer
   x = 983.70