Finding the Fourth Proportional to 10,076.16, 15,122.34 and 5,147.12

Step by Step Solution

1. Step 1: Write the proportion equation
   10,076.16 : 15,122.34 = 5,147.12 : x
2. Step 2: Convert to fraction form
   10,076.16/15,122.34 = 5,147.12/x
3. Step 3: Cross multiply
   10,076.16x = 15,122.34 × 5,147.12
4. Step 4: Simplify right side
   10,076.16x = 77,836,498.66
5. Step 5: Solve for x
   x = 77,836,498.66/10,076.16
6. Step 6: Final answer
   x = 7,724.82