Finding the Fourth Proportional to 1,463.40, 2,019.96 and 991.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,463.40 : 2,019.96 = 991.80 : x
2. Step 2: Convert to fraction form
   1,463.40/2,019.96 = 991.80/x
3. Step 3: Cross multiply
   1,463.40x = 2,019.96 × 991.80
4. Step 4: Simplify right side
   1,463.40x = 2,003,396.33
5. Step 5: Solve for x
   x = 2,003,396.33/1,463.40
6. Step 6: Final answer
   x = 1,369.00