Finding the Fourth Proportional to 2,215, 3,056.72 and 1,283.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,215 : 3,056.72 = 1,283.56 : x
2. Step 2: Convert to fraction form
   2,215/3,056.72 = 1,283.56/x
3. Step 3: Cross multiply
   2,215x = 3,056.72 × 1,283.56
4. Step 4: Simplify right side
   2,215x = 3,923,483.52
5. Step 5: Solve for x
   x = 3,923,483.52/2,215
6. Step 6: Final answer
   x = 1,771.32