Finding the Fourth Proportional to 7,145.78, 10,722.33 and 3,401.79

Step by Step Solution

1. Step 1: Write the proportion equation
   7,145.78 : 10,722.33 = 3,401.79 : x
2. Step 2: Convert to fraction form
   7,145.78/10,722.33 = 3,401.79/x
3. Step 3: Cross multiply
   7,145.78x = 10,722.33 × 3,401.79
4. Step 4: Simplify right side
   7,145.78x = 36,475,097.96
5. Step 5: Solve for x
   x = 36,475,097.96/7,145.78
6. Step 6: Final answer
   x = 5,104.42