Finding the Fourth Proportional to 10,099.38, 15,135.15 and 5,158.59

Step by Step Solution

1. Step 1: Write the proportion equation
   10,099.38 : 15,135.15 = 5,158.59 : x
2. Step 2: Convert to fraction form
   10,099.38/15,135.15 = 5,158.59/x
3. Step 3: Cross multiply
   10,099.38x = 15,135.15 × 5,158.59
4. Step 4: Simplify right side
   10,099.38x = 78,076,033.44
5. Step 5: Solve for x
   x = 78,076,033.44/10,099.38
6. Step 6: Final answer
   x = 7,730.77