Finding the Fourth Proportional to 2,642.20, 3,961.82 and 1,083.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,642.20 : 3,961.82 = 1,083.30 : x
2. Step 2: Convert to fraction form
   2,642.20/3,961.82 = 1,083.30/x
3. Step 3: Cross multiply
   2,642.20x = 3,961.82 × 1,083.30
4. Step 4: Simplify right side
   2,642.20x = 4,291,839.61
5. Step 5: Solve for x
   x = 4,291,839.61/2,642.20
6. Step 6: Final answer
   x = 1,624.34