Finding the Fourth Proportional to 12,136.78, 16,747.99 and 7,357.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,136.78 : 16,747.99 = 7,357.78 : x
2. Step 2: Convert to fraction form
   12,136.78/16,747.99 = 7,357.78/x
3. Step 3: Cross multiply
   12,136.78x = 16,747.99 × 7,357.78
4. Step 4: Simplify right side
   12,136.78x = 123,228,025.86
5. Step 5: Solve for x
   x = 123,228,025.86/12,136.78
6. Step 6: Final answer
   x = 10,153.27