Finding the Fourth Proportional to 8,742.72, 13,046.46 and 7,808.22

Step by Step Solution

1. Step 1: Write the proportion equation
   8,742.72 : 13,046.46 = 7,808.22 : x
2. Step 2: Convert to fraction form
   8,742.72/13,046.46 = 7,808.22/x
3. Step 3: Cross multiply
   8,742.72x = 13,046.46 × 7,808.22
4. Step 4: Simplify right side
   8,742.72x = 101,869,629.90
5. Step 5: Solve for x
   x = 101,869,629.90/8,742.72
6. Step 6: Final answer
   x = 11,651.94