Finding the Fourth Proportional to 2,642.63, 3,961.71 and 1,324.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,642.63 : 3,961.71 = 1,324.76 : x
2. Step 2: Convert to fraction form
   2,642.63/3,961.71 = 1,324.76/x
3. Step 3: Cross multiply
   2,642.63x = 3,961.71 × 1,324.76
4. Step 4: Simplify right side
   2,642.63x = 5,248,308.35
5. Step 5: Solve for x
   x = 5,248,308.35/2,642.63
6. Step 6: Final answer
   x = 1,986.02