Finding the Fourth Proportional to 8,909.78, 12,295.32 and 4,930.89

Step by Step Solution

1. Step 1: Write the proportion equation
   8,909.78 : 12,295.32 = 4,930.89 : x
2. Step 2: Convert to fraction form
   8,909.78/12,295.32 = 4,930.89/x
3. Step 3: Cross multiply
   8,909.78x = 12,295.32 × 4,930.89
4. Step 4: Simplify right side
   8,909.78x = 60,626,870.43
5. Step 5: Solve for x
   x = 60,626,870.43/8,909.78
6. Step 6: Final answer
   x = 6,804.53