Finding the Fourth Proportional to 2,229.47, 3,076.29 and 1,285.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,229.47 : 3,076.29 = 1,285.15 : x
2. Step 2: Convert to fraction form
   2,229.47/3,076.29 = 1,285.15/x
3. Step 3: Cross multiply
   2,229.47x = 3,076.29 × 1,285.15
4. Step 4: Simplify right side
   2,229.47x = 3,953,486.40
5. Step 5: Solve for x
   x = 3,953,486.40/2,229.47
6. Step 6: Final answer
   x = 1,773.28