Finding the Fourth Proportional to 998.75, 1,487.25 and 987.83

Step by Step Solution

1. Step 1: Write the proportion equation
   998.75 : 1,487.25 = 987.83 : x
2. Step 2: Convert to fraction form
   998.75/1,487.25 = 987.83/x
3. Step 3: Cross multiply
   998.75x = 1,487.25 × 987.83
4. Step 4: Simplify right side
   998.75x = 1,469,150.18
5. Step 5: Solve for x
   x = 1,469,150.18/998.75
6. Step 6: Final answer
   x = 1,470.99