Finding the Fourth Proportional to 9,404.79, 12,979.70 and 5,627.89

Step by Step Solution

1. Step 1: Write the proportion equation
   9,404.79 : 12,979.70 = 5,627.89 : x
2. Step 2: Convert to fraction form
   9,404.79/12,979.70 = 5,627.89/x
3. Step 3: Cross multiply
   9,404.79x = 12,979.70 × 5,627.89
4. Step 4: Simplify right side
   9,404.79x = 73,048,323.83
5. Step 5: Solve for x
   x = 73,048,323.83/9,404.79
6. Step 6: Final answer
   x = 7,767.14