Finding the Fourth Proportional to 11,150.94, 15,368.28 and 9,155.10

Step by Step Solution

1. Step 1: Write the proportion equation
   11,150.94 : 15,368.28 = 9,155.10 : x
2. Step 2: Convert to fraction form
   11,150.94/15,368.28 = 9,155.10/x
3. Step 3: Cross multiply
   11,150.94x = 15,368.28 × 9,155.10
4. Step 4: Simplify right side
   11,150.94x = 140,698,140.23
5. Step 5: Solve for x
   x = 140,698,140.23/11,150.94
6. Step 6: Final answer
   x = 12,617.60