Finding the Fourth Proportional to 9,402.06, 12,977.16 and 5,425.54

Step by Step Solution

1. Step 1: Write the proportion equation
   9,402.06 : 12,977.16 = 5,425.54 : x
2. Step 2: Convert to fraction form
   9,402.06/12,977.16 = 5,425.54/x
3. Step 3: Cross multiply
   9,402.06x = 12,977.16 × 5,425.54
4. Step 4: Simplify right side
   9,402.06x = 70,408,100.67
5. Step 5: Solve for x
   x = 70,408,100.67/9,402.06
6. Step 6: Final answer
   x = 7,488.58