Finding the Fourth Proportional to 1,086.12, 1,498.23 and 712.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086.12 : 1,498.23 = 712.98 : x
2. Step 2: Convert to fraction form
   1,086.12/1,498.23 = 712.98/x
3. Step 3: Cross multiply
   1,086.12x = 1,498.23 × 712.98
4. Step 4: Simplify right side
   1,086.12x = 1,068,208.03
5. Step 5: Solve for x
   x = 1,068,208.03/1,086.12
6. Step 6: Final answer
   x = 983.51