Finding the Fourth Proportional to 1,392.62, 1,922.52 and 946.85

Step by Step Solution

1. Step 1: Write the proportion equation
   1,392.62 : 1,922.52 = 946.85 : x
2. Step 2: Convert to fraction form
   1,392.62/1,922.52 = 946.85/x
3. Step 3: Cross multiply
   1,392.62x = 1,922.52 × 946.85
4. Step 4: Simplify right side
   1,392.62x = 1,820,328.45
5. Step 5: Solve for x
   x = 1,820,328.45/1,392.62
6. Step 6: Final answer
   x = 1,307.13