Finding the Fourth Proportional to 2,631.62, 3,946.27 and 987.01

Step by Step Solution

1. Step 1: Write the proportion equation
   2,631.62 : 3,946.27 = 987.01 : x
2. Step 2: Convert to fraction form
   2,631.62/3,946.27 = 987.01/x
3. Step 3: Cross multiply
   2,631.62x = 3,946.27 × 987.01
4. Step 4: Simplify right side
   2,631.62x = 3,895,007.95
5. Step 5: Solve for x
   x = 3,895,007.95/2,631.62
6. Step 6: Final answer
   x = 1,480.08