Finding the Fourth Proportional to 8,630.33, 12,936.50 and 5,857.22

Step by Step Solution

1. Step 1: Write the proportion equation
   8,630.33 : 12,936.50 = 5,857.22 : x
2. Step 2: Convert to fraction form
   8,630.33/12,936.50 = 5,857.22/x
3. Step 3: Cross multiply
   8,630.33x = 12,936.50 × 5,857.22
4. Step 4: Simplify right side
   8,630.33x = 75,771,832.56
5. Step 5: Solve for x
   x = 75,771,832.56/8,630.33
6. Step 6: Final answer
   x = 8,779.72