Finding the Fourth Proportional to 2,158.48, 2,978.72 and 1,227.04

Step by Step Solution

1. Step 1: Write the proportion equation
   2,158.48 : 2,978.72 = 1,227.04 : x
2. Step 2: Convert to fraction form
   2,158.48/2,978.72 = 1,227.04/x
3. Step 3: Cross multiply
   2,158.48x = 2,978.72 × 1,227.04
4. Step 4: Simplify right side
   2,158.48x = 3,655,008.59
5. Step 5: Solve for x
   x = 3,655,008.59/2,158.48
6. Step 6: Final answer
   x = 1,693.33