Finding the Fourth Proportional to 1,672.74, 2,308.47 and 926.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,672.74 : 2,308.47 = 926.79 : x
2. Step 2: Convert to fraction form
   1,672.74/2,308.47 = 926.79/x
3. Step 3: Cross multiply
   1,672.74x = 2,308.47 × 926.79
4. Step 4: Simplify right side
   1,672.74x = 2,139,466.91
5. Step 5: Solve for x
   x = 2,139,466.91/1,672.74
6. Step 6: Final answer
   x = 1,279.02