Finding the Fourth Proportional to 1,361.57, 2,042.70 and 667.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,361.57 : 2,042.70 = 667.30 : x
2. Step 2: Convert to fraction form
   1,361.57/2,042.70 = 667.30/x
3. Step 3: Cross multiply
   1,361.57x = 2,042.70 × 667.30
4. Step 4: Simplify right side
   1,361.57x = 1,363,093.71
5. Step 5: Solve for x
   x = 1,363,093.71/1,361.57
6. Step 6: Final answer
   x = 1,001.12