Finding the Fourth Proportional to 10,079.88, 15,087.47 and 5,388.15

Step by Step Solution

1. Step 1: Write the proportion equation
   10,079.88 : 15,087.47 = 5,388.15 : x
2. Step 2: Convert to fraction form
   10,079.88/15,087.47 = 5,388.15/x
3. Step 3: Cross multiply
   10,079.88x = 15,087.47 × 5,388.15
4. Step 4: Simplify right side
   10,079.88x = 81,293,581.12
5. Step 5: Solve for x
   x = 81,293,581.12/10,079.88
6. Step 6: Final answer
   x = 8,064.94