Finding the Fourth Proportional to 9,404.48, 12,978.06 and 5,425.32

Step by Step Solution

1. Step 1: Write the proportion equation
   9,404.48 : 12,978.06 = 5,425.32 : x
2. Step 2: Convert to fraction form
   9,404.48/12,978.06 = 5,425.32/x
3. Step 3: Cross multiply
   9,404.48x = 12,978.06 × 5,425.32
4. Step 4: Simplify right side
   9,404.48x = 70,410,128.48
5. Step 5: Solve for x
   x = 70,410,128.48/9,404.48
6. Step 6: Final answer
   x = 7,486.87