Finding the Fourth Proportional to 2,158.68, 2,979.98 and 1,627.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,158.68 : 2,979.98 = 1,627.78 : x
2. Step 2: Convert to fraction form
   2,158.68/2,979.98 = 1,627.78/x
3. Step 3: Cross multiply
   2,158.68x = 2,979.98 × 1,627.78
4. Step 4: Simplify right side
   2,158.68x = 4,850,743.71
5. Step 5: Solve for x
   x = 4,850,743.71/2,158.68
6. Step 6: Final answer
   x = 2,247.09