Finding the Fourth Proportional to 1,398.76, 2,098.15 and 667.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,398.76 : 2,098.15 = 667.94 : x
2. Step 2: Convert to fraction form
   1,398.76/2,098.15 = 667.94/x
3. Step 3: Cross multiply
   1,398.76x = 2,098.15 × 667.94
4. Step 4: Simplify right side
   1,398.76x = 1,401,426.15
5. Step 5: Solve for x
   x = 1,401,426.15/1,398.76
6. Step 6: Final answer
   x = 1,001.91