Finding the Fourth Proportional to 7,411.82, 10,223.61 and 5,172.87

Step by Step Solution

1. Step 1: Write the proportion equation
   7,411.82 : 10,223.61 = 5,172.87 : x
2. Step 2: Convert to fraction form
   7,411.82/10,223.61 = 5,172.87/x
3. Step 3: Cross multiply
   7,411.82x = 10,223.61 × 5,172.87
4. Step 4: Simplify right side
   7,411.82x = 52,885,424.40
5. Step 5: Solve for x
   x = 52,885,424.40/7,411.82
6. Step 6: Final answer
   x = 7,135.29