Finding the Fourth Proportional to 2,072.16, 2,858.76 and 1,442.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,072.16 : 2,858.76 = 1,442.52 : x
2. Step 2: Convert to fraction form
   2,072.16/2,858.76 = 1,442.52/x
3. Step 3: Cross multiply
   2,072.16x = 2,858.76 × 1,442.52
4. Step 4: Simplify right side
   2,072.16x = 4,123,818.48
5. Step 5: Solve for x
   x = 4,123,818.48/2,072.16
6. Step 6: Final answer
   x = 1,990.11