Finding the Fourth Proportional to 9,434.78, 13,020.15 and 5,401.59

Step by Step Solution

1. Step 1: Write the proportion equation
   9,434.78 : 13,020.15 = 5,401.59 : x
2. Step 2: Convert to fraction form
   9,434.78/13,020.15 = 5,401.59/x
3. Step 3: Cross multiply
   9,434.78x = 13,020.15 × 5,401.59
4. Step 4: Simplify right side
   9,434.78x = 70,329,485.03
5. Step 5: Solve for x
   x = 70,329,485.03/9,434.78
6. Step 6: Final answer
   x = 7,454.28