Finding the Fourth Proportional to 14,978.25, 20,669.99 and 8,354.25

Step by Step Solution

1. Step 1: Write the proportion equation
   14,978.25 : 20,669.99 = 8,354.25 : x
2. Step 2: Convert to fraction form
   14,978.25/20,669.99 = 8,354.25/x
3. Step 3: Cross multiply
   14,978.25x = 20,669.99 × 8,354.25
4. Step 4: Simplify right side
   14,978.25x = 172,682,222.19
5. Step 5: Solve for x
   x = 172,682,222.19/14,978.25
6. Step 6: Final answer
   x = 11,528.87