Finding the Fourth Proportional to 2,156.40, 3,227.22 and 1,830.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,156.40 : 3,227.22 = 1,830.78 : x
2. Step 2: Convert to fraction form
   2,156.40/3,227.22 = 1,830.78/x
3. Step 3: Cross multiply
   2,156.40x = 3,227.22 × 1,830.78
4. Step 4: Simplify right side
   2,156.40x = 5,908,329.83
5. Step 5: Solve for x
   x = 5,908,329.83/2,156.40
6. Step 6: Final answer
   x = 2,739.90