Finding the Fourth Proportional to 2,108.82, 3,162.24 and 647.58

Step by Step Solution

1. Step 1: Write the proportion equation
   2,108.82 : 3,162.24 = 647.58 : x
2. Step 2: Convert to fraction form
   2,108.82/3,162.24 = 647.58/x
3. Step 3: Cross multiply
   2,108.82x = 3,162.24 × 647.58
4. Step 4: Simplify right side
   2,108.82x = 2,047,803.38
5. Step 5: Solve for x
   x = 2,047,803.38/2,108.82
6. Step 6: Final answer
   x = 971.07