Finding the Fourth Proportional to 6,632.33, 9,150.62 and 3,978.77

Step by Step Solution

1. Step 1: Write the proportion equation
   6,632.33 : 9,150.62 = 3,978.77 : x
2. Step 2: Convert to fraction form
   6,632.33/9,150.62 = 3,978.77/x
3. Step 3: Cross multiply
   6,632.33x = 9,150.62 × 3,978.77
4. Step 4: Simplify right side
   6,632.33x = 36,408,146.69
5. Step 5: Solve for x
   x = 36,408,146.69/6,632.33
6. Step 6: Final answer
   x = 5,489.50