Finding the Fourth Proportional to 1,912.71, 2,639.59 and 1,073.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,912.71 : 2,639.59 = 1,073.48 : x
2. Step 2: Convert to fraction form
   1,912.71/2,639.59 = 1,073.48/x
3. Step 3: Cross multiply
   1,912.71x = 2,639.59 × 1,073.48
4. Step 4: Simplify right side
   1,912.71x = 2,833,552.06
5. Step 5: Solve for x
   x = 2,833,552.06/1,912.71
6. Step 6: Final answer
   x = 1,481.43