Finding the Fourth Proportional to 8,784.27, 12,121.86 and 5,007.60

Step by Step Solution

1. Step 1: Write the proportion equation
   8,784.27 : 12,121.86 = 5,007.60 : x
2. Step 2: Convert to fraction form
   8,784.27/12,121.86 = 5,007.60/x
3. Step 3: Cross multiply
   8,784.27x = 12,121.86 × 5,007.60
4. Step 4: Simplify right side
   8,784.27x = 60,701,426.14
5. Step 5: Solve for x
   x = 60,701,426.14/8,784.27
6. Step 6: Final answer
   x = 6,910.24