Finding the Fourth Proportional to 8,788.77, 12,128.00 and 4,809.96

Step by Step Solution

1. Step 1: Write the proportion equation
   8,788.77 : 12,128.00 = 4,809.96 : x
2. Step 2: Convert to fraction form
   8,788.77/12,128.00 = 4,809.96/x
3. Step 3: Cross multiply
   8,788.77x = 12,128.00 × 4,809.96
4. Step 4: Simplify right side
   8,788.77x = 58,335,170.83
5. Step 5: Solve for x
   x = 58,335,170.83/8,788.77
6. Step 6: Final answer
   x = 6,637.47