Finding the Fourth Proportional to 1,238.54, 1,858.72 and 997.97

Step by Step Solution

1. Step 1: Write the proportion equation
   1,238.54 : 1,858.72 = 997.97 : x
2. Step 2: Convert to fraction form
   1,238.54/1,858.72 = 997.97/x
3. Step 3: Cross multiply
   1,238.54x = 1,858.72 × 997.97
4. Step 4: Simplify right side
   1,238.54x = 1,854,946.80
5. Step 5: Solve for x
   x = 1,854,946.80/1,238.54
6. Step 6: Final answer
   x = 1,497.69