Finding the Fourth Proportional to 10,103.81, 15,158.71 and 5,176.91

Step by Step Solution

1. Step 1: Write the proportion equation
   10,103.81 : 15,158.71 = 5,176.91 : x
2. Step 2: Convert to fraction form
   10,103.81/15,158.71 = 5,176.91/x
3. Step 3: Cross multiply
   10,103.81x = 15,158.71 × 5,176.91
4. Step 4: Simplify right side
   10,103.81x = 78,475,188.65
5. Step 5: Solve for x
   x = 78,475,188.65/10,103.81
6. Step 6: Final answer
   x = 7,766.89