Finding the Fourth Proportional to 8,100.80, 11,175.84 and 5,111.36

Step by Step Solution

1. Step 1: Write the proportion equation
   8,100.80 : 11,175.84 = 5,111.36 : x
2. Step 2: Convert to fraction form
   8,100.80/11,175.84 = 5,111.36/x
3. Step 3: Cross multiply
   8,100.80x = 11,175.84 × 5,111.36
4. Step 4: Simplify right side
   8,100.80x = 57,123,741.54
5. Step 5: Solve for x
   x = 57,123,741.54/8,100.80
6. Step 6: Final answer
   x = 7,051.62