Finding the Fourth Proportional to 1,581.08, 2,359.42 and 1,389.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,581.08 : 2,359.42 = 1,389.10 : x
2. Step 2: Convert to fraction form
   1,581.08/2,359.42 = 1,389.10/x
3. Step 3: Cross multiply
   1,581.08x = 2,359.42 × 1,389.10
4. Step 4: Simplify right side
   1,581.08x = 3,277,470.32
5. Step 5: Solve for x
   x = 3,277,470.32/1,581.08
6. Step 6: Final answer
   x = 2,072.93