Finding the Fourth Proportional to 1,257.32, 1,886.13 and 997.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,257.32 : 1,886.13 = 997.31 : x
2. Step 2: Convert to fraction form
   1,257.32/1,886.13 = 997.31/x
3. Step 3: Cross multiply
   1,257.32x = 1,886.13 × 997.31
4. Step 4: Simplify right side
   1,257.32x = 1,881,061.03
5. Step 5: Solve for x
   x = 1,881,061.03/1,257.32
6. Step 6: Final answer
   x = 1,496.08