Finding the Fourth Proportional to 10,091.92, 15,124.06 and 5,151.20

Step by Step Solution

1. Step 1: Write the proportion equation
   10,091.92 : 15,124.06 = 5,151.20 : x
2. Step 2: Convert to fraction form
   10,091.92/15,124.06 = 5,151.20/x
3. Step 3: Cross multiply
   10,091.92x = 15,124.06 × 5,151.20
4. Step 4: Simplify right side
   10,091.92x = 77,907,057.87
5. Step 5: Solve for x
   x = 77,907,057.87/10,091.92
6. Step 6: Final answer
   x = 7,719.75