Finding the Fourth Proportional to 9,007.10, 12,429.78 and 5,028.21

Step by Step Solution

1. Step 1: Write the proportion equation
   9,007.10 : 12,429.78 = 5,028.21 : x
2. Step 2: Convert to fraction form
   9,007.10/12,429.78 = 5,028.21/x
3. Step 3: Cross multiply
   9,007.10x = 12,429.78 × 5,028.21
4. Step 4: Simplify right side
   9,007.10x = 62,499,544.09
5. Step 5: Solve for x
   x = 62,499,544.09/9,007.10
6. Step 6: Final answer
   x = 6,938.92