Finding the Fourth Proportional to 11,485.17, 17,212.83 and 5,155.37

Step by Step Solution

1. Step 1: Write the proportion equation
   11,485.17 : 17,212.83 = 5,155.37 : x
2. Step 2: Convert to fraction form
   11,485.17/17,212.83 = 5,155.37/x
3. Step 3: Cross multiply
   11,485.17x = 17,212.83 × 5,155.37
4. Step 4: Simplify right side
   11,485.17x = 88,738,529.46
5. Step 5: Solve for x
   x = 88,738,529.46/11,485.17
6. Step 6: Final answer
   x = 7,726.36