Finding the Fourth Proportional to 2,109.72, 3,165.24 and 649.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,109.72 : 3,165.24 = 649.08 : x
2. Step 2: Convert to fraction form
   2,109.72/3,165.24 = 649.08/x
3. Step 3: Cross multiply
   2,109.72x = 3,165.24 × 649.08
4. Step 4: Simplify right side
   2,109.72x = 2,054,493.98
5. Step 5: Solve for x
   x = 2,054,493.98/2,109.72
6. Step 6: Final answer
   x = 973.82