Finding the Fourth Proportional to 9,710.42, 13,399.20 and 5,402.49

Step by Step Solution

1. Step 1: Write the proportion equation
   9,710.42 : 13,399.20 = 5,402.49 : x
2. Step 2: Convert to fraction form
   9,710.42/13,399.20 = 5,402.49/x
3. Step 3: Cross multiply
   9,710.42x = 13,399.20 × 5,402.49
4. Step 4: Simplify right side
   9,710.42x = 72,389,114.51
5. Step 5: Solve for x
   x = 72,389,114.51/9,710.42
6. Step 6: Final answer
   x = 7,454.79