Finding the Fourth Proportional to 1,672.69, 2,308.33 and 926.66

Step by Step Solution

1. Step 1: Write the proportion equation
   1,672.69 : 2,308.33 = 926.66 : x
2. Step 2: Convert to fraction form
   1,672.69/2,308.33 = 926.66/x
3. Step 3: Cross multiply
   1,672.69x = 2,308.33 × 926.66
4. Step 4: Simplify right side
   1,672.69x = 2,139,020.90
5. Step 5: Solve for x
   x = 2,139,020.90/1,672.69
6. Step 6: Final answer
   x = 1,278.79