Finding the Fourth Proportional to 1,672.22, 2,307.59 and 926.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,672.22 : 2,307.59 = 926.17 : x
2. Step 2: Convert to fraction form
   1,672.22/2,307.59 = 926.17/x
3. Step 3: Cross multiply
   1,672.22x = 2,307.59 × 926.17
4. Step 4: Simplify right side
   1,672.22x = 2,137,223.44
5. Step 5: Solve for x
   x = 2,137,223.44/1,672.22
6. Step 6: Final answer
   x = 1,278.08