Finding the Fourth Proportional to 10,099.55, 15,152.97 and 5,171.51

Step by Step Solution

1. Step 1: Write the proportion equation
   10,099.55 : 15,152.97 = 5,171.51 : x
2. Step 2: Convert to fraction form
   10,099.55/15,152.97 = 5,171.51/x
3. Step 3: Cross multiply
   10,099.55x = 15,152.97 × 5,171.51
4. Step 4: Simplify right side
   10,099.55x = 78,363,660.12
5. Step 5: Solve for x
   x = 78,363,660.12/10,099.55
6. Step 6: Final answer
   x = 7,759.13