Finding the Fourth Proportional to 1,672.28, 2,307.69 and 926.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,672.28 : 2,307.69 = 926.27 : x
2. Step 2: Convert to fraction form
   1,672.28/2,307.69 = 926.27/x
3. Step 3: Cross multiply
   1,672.28x = 2,307.69 × 926.27
4. Step 4: Simplify right side
   1,672.28x = 2,137,532.48
5. Step 5: Solve for x
   x = 2,137,532.48/1,672.28
6. Step 6: Final answer
   x = 1,278.22