Finding the Fourth Proportional to 1,642.83, 2,267.10 and 979.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,642.83 : 2,267.10 = 979.71 : x
2. Step 2: Convert to fraction form
   1,642.83/2,267.10 = 979.71/x
3. Step 3: Cross multiply
   1,642.83x = 2,267.10 × 979.71
4. Step 4: Simplify right side
   1,642.83x = 2,221,100.54
5. Step 5: Solve for x
   x = 2,221,100.54/1,642.83
6. Step 6: Final answer
   x = 1,352.00