Finding the Fourth Proportional to 1,116.06, 1,540.72 and 723.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,116.06 : 1,540.72 = 723.40 : x
2. Step 2: Convert to fraction form
   1,116.06/1,540.72 = 723.40/x
3. Step 3: Cross multiply
   1,116.06x = 1,540.72 × 723.40
4. Step 4: Simplify right side
   1,116.06x = 1,114,556.85
5. Step 5: Solve for x
   x = 1,114,556.85/1,116.06
6. Step 6: Final answer
   x = 998.65