Finding the Fourth Proportional to 2,071.24, 2,858.18 and 1,285

Step by Step Solution

1. Step 1: Write the proportion equation
   2,071.24 : 2,858.18 = 1,285 : x
2. Step 2: Convert to fraction form
   2,071.24/2,858.18 = 1,285/x
3. Step 3: Cross multiply
   2,071.24x = 2,858.18 × 1,285
4. Step 4: Simplify right side
   2,071.24x = 3,672,761.30
5. Step 5: Solve for x
   x = 3,672,761.30/2,071.24
6. Step 6: Final answer
   x = 1,773.22