Finding the Fourth Proportional to 1,672.73, 2,308.38 and 926.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,672.73 : 2,308.38 = 926.69 : x
2. Step 2: Convert to fraction form
   1,672.73/2,308.38 = 926.69/x
3. Step 3: Cross multiply
   1,672.73x = 2,308.38 × 926.69
4. Step 4: Simplify right side
   1,672.73x = 2,139,158.43
5. Step 5: Solve for x
   x = 2,139,158.43/1,672.73
6. Step 6: Final answer
   x = 1,278.85