Finding the Fourth Proportional to 8,942.51, 13,404.10 and 3,940.43

Step by Step Solution

1. Step 1: Write the proportion equation
   8,942.51 : 13,404.10 = 3,940.43 : x
2. Step 2: Convert to fraction form
   8,942.51/13,404.10 = 3,940.43/x
3. Step 3: Cross multiply
   8,942.51x = 13,404.10 × 3,940.43
4. Step 4: Simplify right side
   8,942.51x = 52,817,840.89
5. Step 5: Solve for x
   x = 52,817,840.89/8,942.51
6. Step 6: Final answer
   x = 5,906.38