Finding the Fourth Proportional to 2,109.01, 3,164.07 and 648.19

Step by Step Solution

1. Step 1: Write the proportion equation
   2,109.01 : 3,164.07 = 648.19 : x
2. Step 2: Convert to fraction form
   2,109.01/3,164.07 = 648.19/x
3. Step 3: Cross multiply
   2,109.01x = 3,164.07 × 648.19
4. Step 4: Simplify right side
   2,109.01x = 2,050,918.53
5. Step 5: Solve for x
   x = 2,050,918.53/2,109.01
6. Step 6: Final answer
   x = 972.46