Finding the Fourth Proportional to 2,108.53, 3,162.42 and 647.29

Step by Step Solution

1. Step 1: Write the proportion equation
   2,108.53 : 3,162.42 = 647.29 : x
2. Step 2: Convert to fraction form
   2,108.53/3,162.42 = 647.29/x
3. Step 3: Cross multiply
   2,108.53x = 3,162.42 × 647.29
4. Step 4: Simplify right side
   2,108.53x = 2,047,002.84
5. Step 5: Solve for x
   x = 2,047,002.84/2,108.53
6. Step 6: Final answer
   x = 970.82