Finding the Fourth Proportional to 2,158.11, 2,978.16 and 1,273.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,158.11 : 2,978.16 = 1,273.59 : x
2. Step 2: Convert to fraction form
   2,158.11/2,978.16 = 1,273.59/x
3. Step 3: Cross multiply
   2,158.11x = 2,978.16 × 1,273.59
4. Step 4: Simplify right side
   2,158.11x = 3,792,954.79
5. Step 5: Solve for x
   x = 3,792,954.79/2,158.11
6. Step 6: Final answer
   x = 1,757.54