Finding the Fourth Proportional to 1,222.87, 1,821.69 and 1,147.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,222.87 : 1,821.69 = 1,147.24 : x
2. Step 2: Convert to fraction form
   1,222.87/1,821.69 = 1,147.24/x
3. Step 3: Cross multiply
   1,222.87x = 1,821.69 × 1,147.24
4. Step 4: Simplify right side
   1,222.87x = 2,089,912.79
5. Step 5: Solve for x
   x = 2,089,912.79/1,222.87
6. Step 6: Final answer
   x = 1,709.02