Finding the Fourth Proportional to 1,380.57, 2,071.61 and 1,073.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,380.57 : 2,071.61 = 1,073.04 : x
2. Step 2: Convert to fraction form
   1,380.57/2,071.61 = 1,073.04/x
3. Step 3: Cross multiply
   1,380.57x = 2,071.61 × 1,073.04
4. Step 4: Simplify right side
   1,380.57x = 2,222,915.03
5. Step 5: Solve for x
   x = 2,222,915.03/1,380.57
6. Step 6: Final answer
   x = 1,610.14