Finding the Fourth Proportional to 1,672.64, 2,307 and 1,082.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,672.64 : 2,307 = 1,082.72 : x
2. Step 2: Convert to fraction form
   1,672.64/2,307 = 1,082.72/x
3. Step 3: Cross multiply
   1,672.64x = 2,307 × 1,082.72
4. Step 4: Simplify right side
   1,672.64x = 2,497,835.04
5. Step 5: Solve for x
   x = 2,497,835.04/1,672.64
6. Step 6: Final answer
   x = 1,493.35