Finding the Fourth Proportional to 8,847.09, 12,210.72 and 5,072.79

Step by Step Solution

1. Step 1: Write the proportion equation
   8,847.09 : 12,210.72 = 5,072.79 : x
2. Step 2: Convert to fraction form
   8,847.09/12,210.72 = 5,072.79/x
3. Step 3: Cross multiply
   8,847.09x = 12,210.72 × 5,072.79
4. Step 4: Simplify right side
   8,847.09x = 61,942,418.31
5. Step 5: Solve for x
   x = 61,942,418.31/8,847.09
6. Step 6: Final answer
   x = 7,001.45