Finding the Fourth Proportional to 1,379.72, 2,073.94 and 1,150.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,379.72 : 2,073.94 = 1,150.09 : x
2. Step 2: Convert to fraction form
   1,379.72/2,073.94 = 1,150.09/x
3. Step 3: Cross multiply
   1,379.72x = 2,073.94 × 1,150.09
4. Step 4: Simplify right side
   1,379.72x = 2,385,209.59
5. Step 5: Solve for x
   x = 2,385,209.59/1,379.72
6. Step 6: Final answer
   x = 1,728.76