Finding the Fourth Proportional to 2,072.35, 2,859.27 and 1,442.17

Step by Step Solution

1. Step 1: Write the proportion equation
   2,072.35 : 2,859.27 = 1,442.17 : x
2. Step 2: Convert to fraction form
   2,072.35/2,859.27 = 1,442.17/x
3. Step 3: Cross multiply
   2,072.35x = 2,859.27 × 1,442.17
4. Step 4: Simplify right side
   2,072.35x = 4,123,539.12
5. Step 5: Solve for x
   x = 4,123,539.12/2,072.35
6. Step 6: Final answer
   x = 1,989.79