Finding the Fourth Proportional to 9,400.91, 12,974.40 and 5,422.02

Step by Step Solution

1. Step 1: Write the proportion equation
   9,400.91 : 12,974.40 = 5,422.02 : x
2. Step 2: Convert to fraction form
   9,400.91/12,974.40 = 5,422.02/x
3. Step 3: Cross multiply
   9,400.91x = 12,974.40 × 5,422.02
4. Step 4: Simplify right side
   9,400.91x = 70,347,456.29
5. Step 5: Solve for x
   x = 70,347,456.29/9,400.91
6. Step 6: Final answer
   x = 7,483.05