Finding the Fourth Proportional to 10,004.29, 15,006.42 and 3,078.79

Step by Step Solution

1. Step 1: Write the proportion equation
   10,004.29 : 15,006.42 = 3,078.79 : x
2. Step 2: Convert to fraction form
   10,004.29/15,006.42 = 3,078.79/x
3. Step 3: Cross multiply
   10,004.29x = 15,006.42 × 3,078.79
4. Step 4: Simplify right side
   10,004.29x = 46,201,615.83
5. Step 5: Solve for x
   x = 46,201,615.83/10,004.29
6. Step 6: Final answer
   x = 4,618.18