Finding the Fourth Proportional to 1,222.86, 1,676.55 and 1,191.87

Step by Step Solution

1. Step 1: Write the proportion equation
   1,222.86 : 1,676.55 = 1,191.87 : x
2. Step 2: Convert to fraction form
   1,222.86/1,676.55 = 1,191.87/x
3. Step 3: Cross multiply
   1,222.86x = 1,676.55 × 1,191.87
4. Step 4: Simplify right side
   1,222.86x = 1,998,229.65
5. Step 5: Solve for x
   x = 1,998,229.65/1,222.86
6. Step 6: Final answer
   x = 1,634.06