Finding the Fourth Proportional to 2,109.04, 3,164.04 and 648.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,109.04 : 3,164.04 = 648.40 : x
2. Step 2: Convert to fraction form
   2,109.04/3,164.04 = 648.40/x
3. Step 3: Cross multiply
   2,109.04x = 3,164.04 × 648.40
4. Step 4: Simplify right side
   2,109.04x = 2,051,563.54
5. Step 5: Solve for x
   x = 2,051,563.54/2,109.04
6. Step 6: Final answer
   x = 972.75