Finding the Fourth Proportional to 8,942.16, 12,340.16 and 5,404.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,942.16 : 12,340.16 = 5,404.72 : x
2. Step 2: Convert to fraction form
   8,942.16/12,340.16 = 5,404.72/x
3. Step 3: Cross multiply
   8,942.16x = 12,340.16 × 5,404.72
4. Step 4: Simplify right side
   8,942.16x = 66,695,109.56
5. Step 5: Solve for x
   x = 66,695,109.56/8,942.16
6. Step 6: Final answer
   x = 7,458.50