Finding the Fourth Proportional to 2,109.86, 3,165.24 and 648.97

Step by Step Solution

1. Step 1: Write the proportion equation
   2,109.86 : 3,165.24 = 648.97 : x
2. Step 2: Convert to fraction form
   2,109.86/3,165.24 = 648.97/x
3. Step 3: Cross multiply
   2,109.86x = 3,165.24 × 648.97
4. Step 4: Simplify right side
   2,109.86x = 2,054,145.80
5. Step 5: Solve for x
   x = 2,054,145.80/2,109.86
6. Step 6: Final answer
   x = 973.59