Finding the Fourth Proportional to 1,402.72, 2,103.12 and 671.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,402.72 : 2,103.12 = 671.52 : x
2. Step 2: Convert to fraction form
   1,402.72/2,103.12 = 671.52/x
3. Step 3: Cross multiply
   1,402.72x = 2,103.12 × 671.52
4. Step 4: Simplify right side
   1,402.72x = 1,412,287.14
5. Step 5: Solve for x
   x = 1,412,287.14/1,402.72
6. Step 6: Final answer
   x = 1,006.82