Finding the Fourth Proportional to 9,404.77, 12,979.96 and 5,425.10

Step by Step Solution

1. Step 1: Write the proportion equation
   9,404.77 : 12,979.96 = 5,425.10 : x
2. Step 2: Convert to fraction form
   9,404.77/12,979.96 = 5,425.10/x
3. Step 3: Cross multiply
   9,404.77x = 12,979.96 × 5,425.10
4. Step 4: Simplify right side
   9,404.77x = 70,417,553.87
5. Step 5: Solve for x
   x = 70,417,553.87/9,404.77
6. Step 6: Final answer
   x = 7,487.43