Finding the Fourth Proportional to 1,441.98, 1,987.17 and 999.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,441.98 : 1,987.17 = 999.06 : x
2. Step 2: Convert to fraction form
   1,441.98/1,987.17 = 999.06/x
3. Step 3: Cross multiply
   1,441.98x = 1,987.17 × 999.06
4. Step 4: Simplify right side
   1,441.98x = 1,985,302.06
5. Step 5: Solve for x
   x = 1,985,302.06/1,441.98
6. Step 6: Final answer
   x = 1,376.79