Finding the Fourth Proportional to 1,912.72, 2,639.52 and 1,073.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,912.72 : 2,639.52 = 1,073.43 : x
2. Step 2: Convert to fraction form
   1,912.72/2,639.52 = 1,073.43/x
3. Step 3: Cross multiply
   1,912.72x = 2,639.52 × 1,073.43
4. Step 4: Simplify right side
   1,912.72x = 2,833,339.95
5. Step 5: Solve for x
   x = 2,833,339.95/1,912.72
6. Step 6: Final answer
   x = 1,481.31