Finding the Fourth Proportional to 9,404.69, 12,978.45 and 5,628.02

Step by Step Solution

1. Step 1: Write the proportion equation
   9,404.69 : 12,978.45 = 5,628.02 : x
2. Step 2: Convert to fraction form
   9,404.69/12,978.45 = 5,628.02/x
3. Step 3: Cross multiply
   9,404.69x = 12,978.45 × 5,628.02
4. Step 4: Simplify right side
   9,404.69x = 73,042,911.28
5. Step 5: Solve for x
   x = 73,042,911.28/9,404.69
6. Step 6: Final answer
   x = 7,766.65