Finding the Fourth Proportional to 1,672.30, 2,307.72 and 926.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,672.30 : 2,307.72 = 926.25 : x
2. Step 2: Convert to fraction form
   1,672.30/2,307.72 = 926.25/x
3. Step 3: Cross multiply
   1,672.30x = 2,307.72 × 926.25
4. Step 4: Simplify right side
   1,672.30x = 2,137,525.65
5. Step 5: Solve for x
   x = 2,137,525.65/1,672.30
6. Step 6: Final answer
   x = 1,278.20