Finding the Fourth Proportional to 2,230.18, 3,076.90 and 1,285.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,230.18 : 3,076.90 = 1,285.72 : x
2. Step 2: Convert to fraction form
   2,230.18/3,076.90 = 1,285.72/x
3. Step 3: Cross multiply
   2,230.18x = 3,076.90 × 1,285.72
4. Step 4: Simplify right side
   2,230.18x = 3,956,031.87
5. Step 5: Solve for x
   x = 3,956,031.87/2,230.18
6. Step 6: Final answer
   x = 1,773.86