Finding the Fourth Proportional to 8,100.55, 11,175.69 and 5,115.25

Step by Step Solution

1. Step 1: Write the proportion equation
   8,100.55 : 11,175.69 = 5,115.25 : x
2. Step 2: Convert to fraction form
   8,100.55/11,175.69 = 5,115.25/x
3. Step 3: Cross multiply
   8,100.55x = 11,175.69 × 5,115.25
4. Step 4: Simplify right side
   8,100.55x = 57,166,448.27
5. Step 5: Solve for x
   x = 57,166,448.27/8,100.55
6. Step 6: Final answer
   x = 7,057.11