Finding the Fourth Proportional to 6,210.72, 9,315.72 and 3,438.72

Step by Step Solution

1. Step 1: Write the proportion equation
   6,210.72 : 9,315.72 = 3,438.72 : x
2. Step 2: Convert to fraction form
   6,210.72/9,315.72 = 3,438.72/x
3. Step 3: Cross multiply
   6,210.72x = 9,315.72 × 3,438.72
4. Step 4: Simplify right side
   6,210.72x = 32,034,152.68
5. Step 5: Solve for x
   x = 32,034,152.68/6,210.72
6. Step 6: Final answer
   x = 5,157.88