Finding the Fourth Proportional to 1,912.79, 2,639.59 and 1,073.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,912.79 : 2,639.59 = 1,073.50 : x
2. Step 2: Convert to fraction form
   1,912.79/2,639.59 = 1,073.50/x
3. Step 3: Cross multiply
   1,912.79x = 2,639.59 × 1,073.50
4. Step 4: Simplify right side
   1,912.79x = 2,833,590.58
5. Step 5: Solve for x
   x = 2,833,590.58/1,912.79
6. Step 6: Final answer
   x = 1,481.39