Finding the Fourth Proportional to 8,100.54, 11,180.16 and 5,115.42

Step by Step Solution

1. Step 1: Write the proportion equation
   8,100.54 : 11,180.16 = 5,115.42 : x
2. Step 2: Convert to fraction form
   8,100.54/11,180.16 = 5,115.42/x
3. Step 3: Cross multiply
   8,100.54x = 11,180.16 × 5,115.42
4. Step 4: Simplify right side
   8,100.54x = 57,191,214.07
5. Step 5: Solve for x
   x = 57,191,214.07/8,100.54
6. Step 6: Final answer
   x = 7,060.17