Finding the Fourth Proportional to 7,144.74, 10,719.32 and 2,147.31

Step by Step Solution

1. Step 1: Write the proportion equation
   7,144.74 : 10,719.32 = 2,147.31 : x
2. Step 2: Convert to fraction form
   7,144.74/10,719.32 = 2,147.31/x
3. Step 3: Cross multiply
   7,144.74x = 10,719.32 × 2,147.31
4. Step 4: Simplify right side
   7,144.74x = 23,017,692.29
5. Step 5: Solve for x
   x = 23,017,692.29/7,144.74
6. Step 6: Final answer
   x = 3,221.63