Finding the Fourth Proportional to 1,439.93, 1,982.94 and 997.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,439.93 : 1,982.94 = 997.06 : x
2. Step 2: Convert to fraction form
   1,439.93/1,982.94 = 997.06/x
3. Step 3: Cross multiply
   1,439.93x = 1,982.94 × 997.06
4. Step 4: Simplify right side
   1,439.93x = 1,977,110.16
5. Step 5: Solve for x
   x = 1,977,110.16/1,439.93
6. Step 6: Final answer
   x = 1,373.06