Finding the Fourth Proportional to 2,520.96, 3,781.72 and 672.14

Step by Step Solution

1. Step 1: Write the proportion equation
   2,520.96 : 3,781.72 = 672.14 : x
2. Step 2: Convert to fraction form
   2,520.96/3,781.72 = 672.14/x
3. Step 3: Cross multiply
   2,520.96x = 3,781.72 × 672.14
4. Step 4: Simplify right side
   2,520.96x = 2,541,845.28
5. Step 5: Solve for x
   x = 2,541,845.28/2,520.96
6. Step 6: Final answer
   x = 1,008.28