Finding the Fourth Proportional to 1,043.75, 1,564.72 and 394.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,043.75 : 1,564.72 = 394.07 : x
2. Step 2: Convert to fraction form
   1,043.75/1,564.72 = 394.07/x
3. Step 3: Cross multiply
   1,043.75x = 1,564.72 × 394.07
4. Step 4: Simplify right side
   1,043.75x = 616,600.40
5. Step 5: Solve for x
   x = 616,600.40/1,043.75
6. Step 6: Final answer
   x = 590.75