Finding the Fourth Proportional to 2,108.24, 3,162.34 and 647.35

Step by Step Solution

1. Step 1: Write the proportion equation
   2,108.24 : 3,162.34 = 647.35 : x
2. Step 2: Convert to fraction form
   2,108.24/3,162.34 = 647.35/x
3. Step 3: Cross multiply
   2,108.24x = 3,162.34 × 647.35
4. Step 4: Simplify right side
   2,108.24x = 2,047,131.27
5. Step 5: Solve for x
   x = 2,047,131.27/2,108.24
6. Step 6: Final answer
   x = 971.02