Finding the Fourth Proportional to 2,642.72, 3,646.89 and 1,447.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,642.72 : 3,646.89 = 1,447.71 : x
2. Step 2: Convert to fraction form
   2,642.72/3,646.89 = 1,447.71/x
3. Step 3: Cross multiply
   2,642.72x = 3,646.89 × 1,447.71
4. Step 4: Simplify right side
   2,642.72x = 5,279,639.12
5. Step 5: Solve for x
   x = 5,279,639.12/2,642.72
6. Step 6: Final answer
   x = 1,997.80