Finding the Fourth Proportional to 1,214.61, 1,822.73 and 667.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,214.61 : 1,822.73 = 667.18 : x
2. Step 2: Convert to fraction form
   1,214.61/1,822.73 = 667.18/x
3. Step 3: Cross multiply
   1,214.61x = 1,822.73 × 667.18
4. Step 4: Simplify right side
   1,214.61x = 1,216,082.78
5. Step 5: Solve for x
   x = 1,216,082.78/1,214.61
6. Step 6: Final answer
   x = 1,001.21