Finding the Fourth Proportional to 6,764.72, 9,336.76 and 3,970.80

Step by Step Solution

1. Step 1: Write the proportion equation
   6,764.72 : 9,336.76 = 3,970.80 : x
2. Step 2: Convert to fraction form
   6,764.72/9,336.76 = 3,970.80/x
3. Step 3: Cross multiply
   6,764.72x = 9,336.76 × 3,970.80
4. Step 4: Simplify right side
   6,764.72x = 37,074,406.61
5. Step 5: Solve for x
   x = 37,074,406.61/6,764.72
6. Step 6: Final answer
   x = 5,480.55