Finding the Fourth Proportional to 1,404.62, 1,938.12 and 986.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.62 : 1,938.12 = 986.25 : x
2. Step 2: Convert to fraction form
   1,404.62/1,938.12 = 986.25/x
3. Step 3: Cross multiply
   1,404.62x = 1,938.12 × 986.25
4. Step 4: Simplify right side
   1,404.62x = 1,911,470.85
5. Step 5: Solve for x
   x = 1,911,470.85/1,404.62
6. Step 6: Final answer
   x = 1,360.85