Finding the Fourth Proportional to 7,340.10, 10,121.31 and 5,455.18

Step by Step Solution

1. Step 1: Write the proportion equation
   7,340.10 : 10,121.31 = 5,455.18 : x
2. Step 2: Convert to fraction form
   7,340.10/10,121.31 = 5,455.18/x
3. Step 3: Cross multiply
   7,340.10x = 10,121.31 × 5,455.18
4. Step 4: Simplify right side
   7,340.10x = 55,213,567.89
5. Step 5: Solve for x
   x = 55,213,567.89/7,340.10
6. Step 6: Final answer
   x = 7,522.18