Finding the Fourth Proportional to 9,404.21, 12,977.31 and 5,425.09

Step by Step Solution

1. Step 1: Write the proportion equation
   9,404.21 : 12,977.31 = 5,425.09 : x
2. Step 2: Convert to fraction form
   9,404.21/12,977.31 = 5,425.09/x
3. Step 3: Cross multiply
   9,404.21x = 12,977.31 × 5,425.09
4. Step 4: Simplify right side
   9,404.21x = 70,403,009.82
5. Step 5: Solve for x
   x = 70,403,009.82/9,404.21
6. Step 6: Final answer
   x = 7,486.33