Finding the Fourth Proportional to 1,520.78, 2,086.56 and 1,479.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,520.78 : 2,086.56 = 1,479.47 : x
2. Step 2: Convert to fraction form
   1,520.78/2,086.56 = 1,479.47/x
3. Step 3: Cross multiply
   1,520.78x = 2,086.56 × 1,479.47
4. Step 4: Simplify right side
   1,520.78x = 3,086,992.49
5. Step 5: Solve for x
   x = 3,086,992.49/1,520.78
6. Step 6: Final answer
   x = 2,029.88