Finding the Fourth Proportional to 9,404.21, 12,979.85 and 5,628.22

Step by Step Solution

1. Step 1: Write the proportion equation
   9,404.21 : 12,979.85 = 5,628.22 : x
2. Step 2: Convert to fraction form
   9,404.21/12,979.85 = 5,628.22/x
3. Step 3: Cross multiply
   9,404.21x = 12,979.85 × 5,628.22
4. Step 4: Simplify right side
   9,404.21x = 73,053,445.54
5. Step 5: Solve for x
   x = 73,053,445.54/9,404.21
6. Step 6: Final answer
   x = 7,768.16