Finding the Fourth Proportional to 10,002.78, 15,007.41 and 4,809.06

Step by Step Solution

1. Step 1: Write the proportion equation
   10,002.78 : 15,007.41 = 4,809.06 : x
2. Step 2: Convert to fraction form
   10,002.78/15,007.41 = 4,809.06/x
3. Step 3: Cross multiply
   10,002.78x = 15,007.41 × 4,809.06
4. Step 4: Simplify right side
   10,002.78x = 72,171,535.13
5. Step 5: Solve for x
   x = 72,171,535.13/10,002.78
6. Step 6: Final answer
   x = 7,215.15