Finding the Fourth Proportional to 9,359.78, 12,916.41 and 5,168.06

Step by Step Solution

1. Step 1: Write the proportion equation
   9,359.78 : 12,916.41 = 5,168.06 : x
2. Step 2: Convert to fraction form
   9,359.78/12,916.41 = 5,168.06/x
3. Step 3: Cross multiply
   9,359.78x = 12,916.41 × 5,168.06
4. Step 4: Simplify right side
   9,359.78x = 66,752,781.86
5. Step 5: Solve for x
   x = 66,752,781.86/9,359.78
6. Step 6: Final answer
   x = 7,131.88