Finding the Fourth Proportional to 9,388.62, 12,942.49 and 7,146.59

Step by Step Solution

1. Step 1: Write the proportion equation
   9,388.62 : 12,942.49 = 7,146.59 : x
2. Step 2: Convert to fraction form
   9,388.62/12,942.49 = 7,146.59/x
3. Step 3: Cross multiply
   9,388.62x = 12,942.49 × 7,146.59
4. Step 4: Simplify right side
   9,388.62x = 92,494,569.16
5. Step 5: Solve for x
   x = 92,494,569.16/9,388.62
6. Step 6: Final answer
   x = 9,851.78