Finding the Fourth Proportional to 1,744.82, 2,408.27 and 999.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,744.82 : 2,408.27 = 999.21 : x
2. Step 2: Convert to fraction form
   1,744.82/2,408.27 = 999.21/x
3. Step 3: Cross multiply
   1,744.82x = 2,408.27 × 999.21
4. Step 4: Simplify right side
   1,744.82x = 2,406,362.47
5. Step 5: Solve for x
   x = 2,406,362.47/1,744.82
6. Step 6: Final answer
   x = 1,379.15