Finding the Fourth Proportional to 8,909.45, 12,293.78 and 4,930.55

Step by Step Solution

1. Step 1: Write the proportion equation
   8,909.45 : 12,293.78 = 4,930.55 : x
2. Step 2: Convert to fraction form
   8,909.45/12,293.78 = 4,930.55/x
3. Step 3: Cross multiply
   8,909.45x = 12,293.78 × 4,930.55
4. Step 4: Simplify right side
   8,909.45x = 60,615,010.86
5. Step 5: Solve for x
   x = 60,615,010.86/8,909.45
6. Step 6: Final answer
   x = 6,803.46