Finding the Fourth Proportional to 1,642.96, 2,266.86 and 979.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,642.96 : 2,266.86 = 979.52 : x
2. Step 2: Convert to fraction form
   1,642.96/2,266.86 = 979.52/x
3. Step 3: Cross multiply
   1,642.96x = 2,266.86 × 979.52
4. Step 4: Simplify right side
   1,642.96x = 2,220,434.71
5. Step 5: Solve for x
   x = 2,220,434.71/1,642.96
6. Step 6: Final answer
   x = 1,351.48