Finding the Fourth Proportional to 1,216.01, 1,677.85 and 718.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,216.01 : 1,677.85 = 718.27 : x
2. Step 2: Convert to fraction form
   1,216.01/1,677.85 = 718.27/x
3. Step 3: Cross multiply
   1,216.01x = 1,677.85 × 718.27
4. Step 4: Simplify right side
   1,216.01x = 1,205,143.33
5. Step 5: Solve for x
   x = 1,205,143.33/1,216.01
6. Step 6: Final answer
   x = 991.06