Finding the Fourth Proportional to 6,275.34, 8,663.72 and 3,920.67

Step by Step Solution

1. Step 1: Write the proportion equation
   6,275.34 : 8,663.72 = 3,920.67 : x
2. Step 2: Convert to fraction form
   6,275.34/8,663.72 = 3,920.67/x
3. Step 3: Cross multiply
   6,275.34x = 8,663.72 × 3,920.67
4. Step 4: Simplify right side
   6,275.34x = 33,967,567.49
5. Step 5: Solve for x
   x = 33,967,567.49/6,275.34
6. Step 6: Final answer
   x = 5,412.86