Finding the Fourth Proportional to 9,428.07, 13,019.49 and 6,078.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,428.07 : 13,019.49 = 6,078.72 : x
2. Step 2: Convert to fraction form
   9,428.07/13,019.49 = 6,078.72/x
3. Step 3: Cross multiply
   9,428.07x = 13,019.49 × 6,078.72
4. Step 4: Simplify right side
   9,428.07x = 79,141,834.25
5. Step 5: Solve for x
   x = 79,141,834.25/9,428.07
6. Step 6: Final answer
   x = 8,394.28