Finding the Fourth Proportional to 1,025.48, 1,415.15 and 559.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,025.48 : 1,415.15 = 559.73 : x
2. Step 2: Convert to fraction form
   1,025.48/1,415.15 = 559.73/x
3. Step 3: Cross multiply
   1,025.48x = 1,415.15 × 559.73
4. Step 4: Simplify right side
   1,025.48x = 792,099.94
5. Step 5: Solve for x
   x = 792,099.94/1,025.48
6. Step 6: Final answer
   x = 772.42