Finding the Fourth Proportional to 8,906.99, 12,291.72 and 4,928.18

Step by Step Solution

1. Step 1: Write the proportion equation
   8,906.99 : 12,291.72 = 4,928.18 : x
2. Step 2: Convert to fraction form
   8,906.99/12,291.72 = 4,928.18/x
3. Step 3: Cross multiply
   8,906.99x = 12,291.72 × 4,928.18
4. Step 4: Simplify right side
   8,906.99x = 60,575,811.79
5. Step 5: Solve for x
   x = 60,575,811.79/8,906.99
6. Step 6: Final answer
   x = 6,800.93