Finding the Fourth Proportional to 2,020.48, 2,784.72 and 1,964.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,020.48 : 2,784.72 = 1,964.32 : x
2. Step 2: Convert to fraction form
   2,020.48/2,784.72 = 1,964.32/x
3. Step 3: Cross multiply
   2,020.48x = 2,784.72 × 1,964.32
4. Step 4: Simplify right side
   2,020.48x = 5,470,081.19
5. Step 5: Solve for x
   x = 5,470,081.19/2,020.48
6. Step 6: Final answer
   x = 2,707.32