Finding the Fourth Proportional to 9,402.03, 12,974.85 and 5,423.31

Step by Step Solution

1. Step 1: Write the proportion equation
   9,402.03 : 12,974.85 = 5,423.31 : x
2. Step 2: Convert to fraction form
   9,402.03/12,974.85 = 5,423.31/x
3. Step 3: Cross multiply
   9,402.03x = 12,974.85 × 5,423.31
4. Step 4: Simplify right side
   9,402.03x = 70,366,633.75
5. Step 5: Solve for x
   x = 70,366,633.75/9,402.03
6. Step 6: Final answer
   x = 7,484.20