Finding the Fourth Proportional to 9,935.10, 13,710.21 and 5,397.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,935.10 : 13,710.21 = 5,397.72 : x
2. Step 2: Convert to fraction form
   9,935.10/13,710.21 = 5,397.72/x
3. Step 3: Cross multiply
   9,935.10x = 13,710.21 × 5,397.72
4. Step 4: Simplify right side
   9,935.10x = 74,003,874.72
5. Step 5: Solve for x
   x = 74,003,874.72/9,935.10
6. Step 6: Final answer
   x = 7,448.73