Finding the Fourth Proportional to 8,155.46, 11,255.67 and 5,171.58

Step by Step Solution

1. Step 1: Write the proportion equation
   8,155.46 : 11,255.67 = 5,171.58 : x
2. Step 2: Convert to fraction form
   8,155.46/11,255.67 = 5,171.58/x
3. Step 3: Cross multiply
   8,155.46x = 11,255.67 × 5,171.58
4. Step 4: Simplify right side
   8,155.46x = 58,209,597.86
5. Step 5: Solve for x
   x = 58,209,597.86/8,155.46
6. Step 6: Final answer
   x = 7,137.50