Finding the Fourth Proportional to 11,887.16, 16,395.78 and 7,906.28

Step by Step Solution

1. Step 1: Write the proportion equation
   11,887.16 : 16,395.78 = 7,906.28 : x
2. Step 2: Convert to fraction form
   11,887.16/16,395.78 = 7,906.28/x
3. Step 3: Cross multiply
   11,887.16x = 16,395.78 × 7,906.28
4. Step 4: Simplify right side
   11,887.16x = 129,629,627.50
5. Step 5: Solve for x
   x = 129,629,627.50/11,887.16
6. Step 6: Final answer
   x = 10,905.01