Finding the Fourth Proportional to 1,442.62, 2,152.70 and 1,278.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,442.62 : 2,152.70 = 1,278.59 : x
2. Step 2: Convert to fraction form
   1,442.62/2,152.70 = 1,278.59/x
3. Step 3: Cross multiply
   1,442.62x = 2,152.70 × 1,278.59
4. Step 4: Simplify right side
   1,442.62x = 2,752,420.69
5. Step 5: Solve for x
   x = 2,752,420.69/1,442.62
6. Step 6: Final answer
   x = 1,907.94