Finding the Fourth Proportional to 2,642.77, 3,962.46 and 1,326.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,642.77 : 3,962.46 = 1,326.16 : x
2. Step 2: Convert to fraction form
   2,642.77/3,962.46 = 1,326.16/x
3. Step 3: Cross multiply
   2,642.77x = 3,962.46 × 1,326.16
4. Step 4: Simplify right side
   2,642.77x = 5,254,855.95
5. Step 5: Solve for x
   x = 5,254,855.95/2,642.77
6. Step 6: Final answer
   x = 1,988.39