Finding the Fourth Proportional to 10,104.32, 15,151.29 and 5,428.27

Step by Step Solution

1. Step 1: Write the proportion equation
   10,104.32 : 15,151.29 = 5,428.27 : x
2. Step 2: Convert to fraction form
   10,104.32/15,151.29 = 5,428.27/x
3. Step 3: Cross multiply
   10,104.32x = 15,151.29 × 5,428.27
4. Step 4: Simplify right side
   10,104.32x = 82,245,291.55
5. Step 5: Solve for x
   x = 82,245,291.55/10,104.32
6. Step 6: Final answer
   x = 8,139.61