Finding the Fourth Proportional to 1,401.72, 2,101.36 and 671.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.72 : 2,101.36 = 671.08 : x
2. Step 2: Convert to fraction form
   1,401.72/2,101.36 = 671.08/x
3. Step 3: Cross multiply
   1,401.72x = 2,101.36 × 671.08
4. Step 4: Simplify right side
   1,401.72x = 1,410,180.67
5. Step 5: Solve for x
   x = 1,410,180.67/1,401.72
6. Step 6: Final answer
   x = 1,006.04