Finding the Fourth Proportional to 8,131.36, 12,186.10 and 5,929.78

Step by Step Solution

1. Step 1: Write the proportion equation
   8,131.36 : 12,186.10 = 5,929.78 : x
2. Step 2: Convert to fraction form
   8,131.36/12,186.10 = 5,929.78/x
3. Step 3: Cross multiply
   8,131.36x = 12,186.10 × 5,929.78
4. Step 4: Simplify right side
   8,131.36x = 72,260,892.06
5. Step 5: Solve for x
   x = 72,260,892.06/8,131.36
6. Step 6: Final answer
   x = 8,886.69