Finding the Fourth Proportional to 5,227.31, 7,213.69 and 2,869.61

Step by Step Solution

1. Step 1: Write the proportion equation
   5,227.31 : 7,213.69 = 2,869.61 : x
2. Step 2: Convert to fraction form
   5,227.31/7,213.69 = 2,869.61/x
3. Step 3: Cross multiply
   5,227.31x = 7,213.69 × 2,869.61
4. Step 4: Simplify right side
   5,227.31x = 20,700,444.48
5. Step 5: Solve for x
   x = 20,700,444.48/5,227.31
6. Step 6: Final answer
   x = 3,960.05