Finding the Fourth Proportional to 2,975.20, 4,105.72 and 1,648.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,975.20 : 4,105.72 = 1,648.88 : x
2. Step 2: Convert to fraction form
   2,975.20/4,105.72 = 1,648.88/x
3. Step 3: Cross multiply
   2,975.20x = 4,105.72 × 1,648.88
4. Step 4: Simplify right side
   2,975.20x = 6,769,839.59
5. Step 5: Solve for x
   x = 6,769,839.59/2,975.20
6. Step 6: Final answer
   x = 2,275.42