Finding the Fourth Proportional to 1,054.78, 1,582.17 and 477.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,054.78 : 1,582.17 = 477.52 : x
2. Step 2: Convert to fraction form
   1,054.78/1,582.17 = 477.52/x
3. Step 3: Cross multiply
   1,054.78x = 1,582.17 × 477.52
4. Step 4: Simplify right side
   1,054.78x = 755,517.82
5. Step 5: Solve for x
   x = 755,517.82/1,054.78
6. Step 6: Final answer
   x = 716.28