Finding the Fourth Proportional to 1,642.82, 2,449.76 and 1,628.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,642.82 : 2,449.76 = 1,628.01 : x
2. Step 2: Convert to fraction form
   1,642.82/2,449.76 = 1,628.01/x
3. Step 3: Cross multiply
   1,642.82x = 2,449.76 × 1,628.01
4. Step 4: Simplify right side
   1,642.82x = 3,988,233.78
5. Step 5: Solve for x
   x = 3,988,233.78/1,642.82
6. Step 6: Final answer
   x = 2,427.68