Finding the Fourth Proportional to 1,046.52, 1,569.61 and 388.70

Step by Step Solution

1. Step 1: Write the proportion equation
   1,046.52 : 1,569.61 = 388.70 : x
2. Step 2: Convert to fraction form
   1,046.52/1,569.61 = 388.70/x
3. Step 3: Cross multiply
   1,046.52x = 1,569.61 × 388.70
4. Step 4: Simplify right side
   1,046.52x = 610,105.93
5. Step 5: Solve for x
   x = 610,105.93/1,046.52
6. Step 6: Final answer
   x = 582.99