Finding the Fourth Proportional to 6,300.72, 9,452.25 and 2,139.57

Step by Step Solution

1. Step 1: Write the proportion equation
   6,300.72 : 9,452.25 = 2,139.57 : x
2. Step 2: Convert to fraction form
   6,300.72/9,452.25 = 2,139.57/x
3. Step 3: Cross multiply
   6,300.72x = 9,452.25 × 2,139.57
4. Step 4: Simplify right side
   6,300.72x = 20,223,750.53
5. Step 5: Solve for x
   x = 20,223,750.53/6,300.72
6. Step 6: Final answer
   x = 3,209.75