Finding the Fourth Proportional to 2,227.50, 3,340.17 and 1,056.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,227.50 : 3,340.17 = 1,056.78 : x
2. Step 2: Convert to fraction form
   2,227.50/3,340.17 = 1,056.78/x
3. Step 3: Cross multiply
   2,227.50x = 3,340.17 × 1,056.78
4. Step 4: Simplify right side
   2,227.50x = 3,529,824.85
5. Step 5: Solve for x
   x = 3,529,824.85/2,227.50
6. Step 6: Final answer
   x = 1,584.66