Finding the Fourth Proportional to 9,404.10, 12,979 and 5,424.42

Step by Step Solution

1. Step 1: Write the proportion equation
   9,404.10 : 12,979 = 5,424.42 : x
2. Step 2: Convert to fraction form
   9,404.10/12,979 = 5,424.42/x
3. Step 3: Cross multiply
   9,404.10x = 12,979 × 5,424.42
4. Step 4: Simplify right side
   9,404.10x = 70,403,547.18
5. Step 5: Solve for x
   x = 70,403,547.18/9,404.10
6. Step 6: Final answer
   x = 7,486.47