Finding the Fourth Proportional to 8,736.72, 12,056.71 and 5,200.05

Step by Step Solution

1. Step 1: Write the proportion equation
   8,736.72 : 12,056.71 = 5,200.05 : x
2. Step 2: Convert to fraction form
   8,736.72/12,056.71 = 5,200.05/x
3. Step 3: Cross multiply
   8,736.72x = 12,056.71 × 5,200.05
4. Step 4: Simplify right side
   8,736.72x = 62,695,494.84
5. Step 5: Solve for x
   x = 62,695,494.84/8,736.72
6. Step 6: Final answer
   x = 7,176.09