Finding the Fourth Proportional to 1,315.98, 1,974.38 and 946.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,315.98 : 1,974.38 = 946.62 : x
2. Step 2: Convert to fraction form
   1,315.98/1,974.38 = 946.62/x
3. Step 3: Cross multiply
   1,315.98x = 1,974.38 × 946.62
4. Step 4: Simplify right side
   1,315.98x = 1,868,982.86
5. Step 5: Solve for x
   x = 1,868,982.86/1,315.98
6. Step 6: Final answer
   x = 1,420.22