Finding the Fourth Proportional to 1,118.67, 1,678.56 and 502.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,118.67 : 1,678.56 = 502.82 : x
2. Step 2: Convert to fraction form
   1,118.67/1,678.56 = 502.82/x
3. Step 3: Cross multiply
   1,118.67x = 1,678.56 × 502.82
4. Step 4: Simplify right side
   1,118.67x = 844,005.15
5. Step 5: Solve for x
   x = 844,005.15/1,118.67
6. Step 6: Final answer
   x = 754.47