Finding the Fourth Proportional to 2,642.90, 3,964.88 and 1,327.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,642.90 : 3,964.88 = 1,327.52 : x
2. Step 2: Convert to fraction form
   2,642.90/3,964.88 = 1,327.52/x
3. Step 3: Cross multiply
   2,642.90x = 3,964.88 × 1,327.52
4. Step 4: Simplify right side
   2,642.90x = 5,263,470.73
5. Step 5: Solve for x
   x = 5,263,470.73/2,642.90
6. Step 6: Final answer
   x = 1,991.55