Finding the Fourth Proportional to 1,111.82, 1,534.68 and 718.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.82 : 1,534.68 = 718.54 : x
2. Step 2: Convert to fraction form
   1,111.82/1,534.68 = 718.54/x
3. Step 3: Cross multiply
   1,111.82x = 1,534.68 × 718.54
4. Step 4: Simplify right side
   1,111.82x = 1,102,728.97
5. Step 5: Solve for x
   x = 1,102,728.97/1,111.82
6. Step 6: Final answer
   x = 991.82