Finding the Fourth Proportional to 2,155.28, 2,975.47 and 1,448.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,155.28 : 2,975.47 = 1,448.15 : x
2. Step 2: Convert to fraction form
   2,155.28/2,975.47 = 1,448.15/x
3. Step 3: Cross multiply
   2,155.28x = 2,975.47 × 1,448.15
4. Step 4: Simplify right side
   2,155.28x = 4,308,908.38
5. Step 5: Solve for x
   x = 4,308,908.38/2,155.28
6. Step 6: Final answer
   x = 1,999.24