Finding the Fourth Proportional to 2,109.82, 3,164.73 and 648.99

Step by Step Solution

1. Step 1: Write the proportion equation
   2,109.82 : 3,164.73 = 648.99 : x
2. Step 2: Convert to fraction form
   2,109.82/3,164.73 = 648.99/x
3. Step 3: Cross multiply
   2,109.82x = 3,164.73 × 648.99
4. Step 4: Simplify right side
   2,109.82x = 2,053,878.12
5. Step 5: Solve for x
   x = 2,053,878.12/2,109.82
6. Step 6: Final answer
   x = 973.49