Finding the Fourth Proportional to 1,401.84, 2,099.57 and 671.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.84 : 2,099.57 = 671.94 : x
2. Step 2: Convert to fraction form
   1,401.84/2,099.57 = 671.94/x
3. Step 3: Cross multiply
   1,401.84x = 2,099.57 × 671.94
4. Step 4: Simplify right side
   1,401.84x = 1,410,781.71
5. Step 5: Solve for x
   x = 1,410,781.71/1,401.84
6. Step 6: Final answer
   x = 1,006.38