Finding the Fourth Proportional to 1,439.32, 1,985.46 and 997.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,439.32 : 1,985.46 = 997.48 : x
2. Step 2: Convert to fraction form
   1,439.32/1,985.46 = 997.48/x
3. Step 3: Cross multiply
   1,439.32x = 1,985.46 × 997.48
4. Step 4: Simplify right side
   1,439.32x = 1,980,456.64
5. Step 5: Solve for x
   x = 1,980,456.64/1,439.32
6. Step 6: Final answer
   x = 1,375.97