Finding the Fourth Proportional to 1,116.96, 1,540.78 and 712.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,116.96 : 1,540.78 = 712.43 : x
2. Step 2: Convert to fraction form
   1,116.96/1,540.78 = 712.43/x
3. Step 3: Cross multiply
   1,116.96x = 1,540.78 × 712.43
4. Step 4: Simplify right side
   1,116.96x = 1,097,697.90
5. Step 5: Solve for x
   x = 1,097,697.90/1,116.96
6. Step 6: Final answer
   x = 982.75