Finding the Fourth Proportional to 8,156.77, 11,256.78 and 5,171.52

Step by Step Solution

1. Step 1: Write the proportion equation
   8,156.77 : 11,256.78 = 5,171.52 : x
2. Step 2: Convert to fraction form
   8,156.77/11,256.78 = 5,171.52/x
3. Step 3: Cross multiply
   8,156.77x = 11,256.78 × 5,171.52
4. Step 4: Simplify right side
   8,156.77x = 58,214,662.91
5. Step 5: Solve for x
   x = 58,214,662.91/8,156.77
6. Step 6: Final answer
   x = 7,136.97