Finding the Fourth Proportional to 10,004.28, 15,014.84 and 5,005.15

Step by Step Solution

1. Step 1: Write the proportion equation
   10,004.28 : 15,014.84 = 5,005.15 : x
2. Step 2: Convert to fraction form
   10,004.28/15,014.84 = 5,005.15/x
3. Step 3: Cross multiply
   10,004.28x = 15,014.84 × 5,005.15
4. Step 4: Simplify right side
   10,004.28x = 75,151,526.43
5. Step 5: Solve for x
   x = 75,151,526.43/10,004.28
6. Step 6: Final answer
   x = 7,511.94