Finding the Fourth Proportional to 8,788.43, 12,128.21 and 4,809.62

Step by Step Solution

1. Step 1: Write the proportion equation
   8,788.43 : 12,128.21 = 4,809.62 : x
2. Step 2: Convert to fraction form
   8,788.43/12,128.21 = 4,809.62/x
3. Step 3: Cross multiply
   8,788.43x = 12,128.21 × 4,809.62
4. Step 4: Simplify right side
   8,788.43x = 58,331,996.69
5. Step 5: Solve for x
   x = 58,331,996.69/8,788.43
6. Step 6: Final answer
   x = 6,637.37