Finding the Fourth Proportional to 1,222.12, 1,830.06 and 673.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,222.12 : 1,830.06 = 673.71 : x
2. Step 2: Convert to fraction form
   1,222.12/1,830.06 = 673.71/x
3. Step 3: Cross multiply
   1,222.12x = 1,830.06 × 673.71
4. Step 4: Simplify right side
   1,222.12x = 1,232,929.72
5. Step 5: Solve for x
   x = 1,232,929.72/1,222.12
6. Step 6: Final answer
   x = 1,008.85