Finding the Fourth Proportional to 2,642.20, 3,651.42 and 2,169.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,642.20 : 3,651.42 = 2,169.34 : x
2. Step 2: Convert to fraction form
   2,642.20/3,651.42 = 2,169.34/x
3. Step 3: Cross multiply
   2,642.20x = 3,651.42 × 2,169.34
4. Step 4: Simplify right side
   2,642.20x = 7,921,171.46
5. Step 5: Solve for x
   x = 7,921,171.46/2,642.20
6. Step 6: Final answer
   x = 2,997.95