Finding the Fourth Proportional to 2,642.39, 3,964.65 and 999.41

Step by Step Solution

1. Step 1: Write the proportion equation
   2,642.39 : 3,964.65 = 999.41 : x
2. Step 2: Convert to fraction form
   2,642.39/3,964.65 = 999.41/x
3. Step 3: Cross multiply
   2,642.39x = 3,964.65 × 999.41
4. Step 4: Simplify right side
   2,642.39x = 3,962,291.03
5. Step 5: Solve for x
   x = 3,962,291.03/2,642.39
6. Step 6: Final answer
   x = 1,499.51