Finding the Fourth Proportional to 7,311.72, 10,092.55 and 5,422.70

Step by Step Solution

1. Step 1: Write the proportion equation
   7,311.72 : 10,092.55 = 5,422.70 : x
2. Step 2: Convert to fraction form
   7,311.72/10,092.55 = 5,422.70/x
3. Step 3: Cross multiply
   7,311.72x = 10,092.55 × 5,422.70
4. Step 4: Simplify right side
   7,311.72x = 54,728,835.96
5. Step 5: Solve for x
   x = 54,728,835.96/7,311.72
6. Step 6: Final answer
   x = 7,485.09