Finding the Fourth Proportional to 1,200.18, 1,656.12 and 885.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,200.18 : 1,656.12 = 885.61 : x
2. Step 2: Convert to fraction form
   1,200.18/1,656.12 = 885.61/x
3. Step 3: Cross multiply
   1,200.18x = 1,656.12 × 885.61
4. Step 4: Simplify right side
   1,200.18x = 1,466,676.43
5. Step 5: Solve for x
   x = 1,466,676.43/1,200.18
6. Step 6: Final answer
   x = 1,222.05