Finding the Fourth Proportional to 8,784.05, 12,120.57 and 5,007.22

Step by Step Solution

1. Step 1: Write the proportion equation
   8,784.05 : 12,120.57 = 5,007.22 : x
2. Step 2: Convert to fraction form
   8,784.05/12,120.57 = 5,007.22/x
3. Step 3: Cross multiply
   8,784.05x = 12,120.57 × 5,007.22
4. Step 4: Simplify right side
   8,784.05x = 60,690,360.52
5. Step 5: Solve for x
   x = 60,690,360.52/8,784.05
6. Step 6: Final answer
   x = 6,909.15