Finding the Fourth Proportional to 6,630.50, 9,151.72 and 3,977.35

Step by Step Solution

1. Step 1: Write the proportion equation
   6,630.50 : 9,151.72 = 3,977.35 : x
2. Step 2: Convert to fraction form
   6,630.50/9,151.72 = 3,977.35/x
3. Step 3: Cross multiply
   6,630.50x = 9,151.72 × 3,977.35
4. Step 4: Simplify right side
   6,630.50x = 36,399,560.72
5. Step 5: Solve for x
   x = 36,399,560.72/6,630.50
6. Step 6: Final answer
   x = 5,489.71