Finding the Fourth Proportional to 8,788.86, 12,128.94 and 4,809.98

Step by Step Solution

1. Step 1: Write the proportion equation
   8,788.86 : 12,128.94 = 4,809.98 : x
2. Step 2: Convert to fraction form
   8,788.86/12,128.94 = 4,809.98/x
3. Step 3: Cross multiply
   8,788.86x = 12,128.94 × 4,809.98
4. Step 4: Simplify right side
   8,788.86x = 58,339,898.18
5. Step 5: Solve for x
   x = 58,339,898.18/8,788.86
6. Step 6: Final answer
   x = 6,637.94