Finding the Fourth Proportional to 1,642.71, 2,267.22 and 1,568.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,642.71 : 2,267.22 = 1,568.89 : x
2. Step 2: Convert to fraction form
   1,642.71/2,267.22 = 1,568.89/x
3. Step 3: Cross multiply
   1,642.71x = 2,267.22 × 1,568.89
4. Step 4: Simplify right side
   1,642.71x = 3,557,018.79
5. Step 5: Solve for x
   x = 3,557,018.79/1,642.71
6. Step 6: Final answer
   x = 2,165.34