Finding the Fourth Proportional to 9,404.78, 12,975.12 and 5,628.03

Step by Step Solution

1. Step 1: Write the proportion equation
   9,404.78 : 12,975.12 = 5,628.03 : x
2. Step 2: Convert to fraction form
   9,404.78/12,975.12 = 5,628.03/x
3. Step 3: Cross multiply
   9,404.78x = 12,975.12 × 5,628.03
4. Step 4: Simplify right side
   9,404.78x = 73,024,364.61
5. Step 5: Solve for x
   x = 73,024,364.61/9,404.78
6. Step 6: Final answer
   x = 7,764.61