Finding the Fourth Proportional to 1,371.30, 1,891.76 and 997.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,371.30 : 1,891.76 = 997.48 : x
2. Step 2: Convert to fraction form
   1,371.30/1,891.76 = 997.48/x
3. Step 3: Cross multiply
   1,371.30x = 1,891.76 × 997.48
4. Step 4: Simplify right side
   1,371.30x = 1,886,990.14
5. Step 5: Solve for x
   x = 1,886,990.14/1,371.30
6. Step 6: Final answer
   x = 1,376.06