Finding the Fourth Proportional to 9,401.20, 12,974.29 and 5,422.58

Step by Step Solution

1. Step 1: Write the proportion equation
   9,401.20 : 12,974.29 = 5,422.58 : x
2. Step 2: Convert to fraction form
   9,401.20/12,974.29 = 5,422.58/x
3. Step 3: Cross multiply
   9,401.20x = 12,974.29 × 5,422.58
4. Step 4: Simplify right side
   9,401.20x = 70,354,125.47
5. Step 5: Solve for x
   x = 70,354,125.47/9,401.20
6. Step 6: Final answer
   x = 7,483.53