Finding the Fourth Proportional to 1,200.74, 1,656.91 and 886.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,200.74 : 1,656.91 = 886.17 : x
2. Step 2: Convert to fraction form
   1,200.74/1,656.91 = 886.17/x
3. Step 3: Cross multiply
   1,200.74x = 1,656.91 × 886.17
4. Step 4: Simplify right side
   1,200.74x = 1,468,306.27
5. Step 5: Solve for x
   x = 1,468,306.27/1,200.74
6. Step 6: Final answer
   x = 1,222.83