Finding the Fourth Proportional to 9,678.24, 13,424.28 and 9,422.10

Step by Step Solution

1. Step 1: Write the proportion equation
   9,678.24 : 13,424.28 = 9,422.10 : x
2. Step 2: Convert to fraction form
   9,678.24/13,424.28 = 9,422.10/x
3. Step 3: Cross multiply
   9,678.24x = 13,424.28 × 9,422.10
4. Step 4: Simplify right side
   9,678.24x = 126,484,908.59
5. Step 5: Solve for x
   x = 126,484,908.59/9,678.24
6. Step 6: Final answer
   x = 13,069.00