Finding the Fourth Proportional to 1,912.84, 2,639.72 and 1,073.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,912.84 : 2,639.72 = 1,073.56 : x
2. Step 2: Convert to fraction form
   1,912.84/2,639.72 = 1,073.56/x
3. Step 3: Cross multiply
   1,912.84x = 2,639.72 × 1,073.56
4. Step 4: Simplify right side
   1,912.84x = 2,833,897.80
5. Step 5: Solve for x
   x = 2,833,897.80/1,912.84
6. Step 6: Final answer
   x = 1,481.51