Finding the Fourth Proportional to 12,380.61, 18,575.78 and 5,450.25

Step by Step Solution

1. Step 1: Write the proportion equation
   12,380.61 : 18,575.78 = 5,450.25 : x
2. Step 2: Convert to fraction form
   12,380.61/18,575.78 = 5,450.25/x
3. Step 3: Cross multiply
   12,380.61x = 18,575.78 × 5,450.25
4. Step 4: Simplify right side
   12,380.61x = 101,242,617.69
5. Step 5: Solve for x
   x = 101,242,617.69/12,380.61
6. Step 6: Final answer
   x = 8,177.51