Finding the Fourth Proportional to 1,013.37, 1,510.69 and 997.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,013.37 : 1,510.69 = 997.57 : x
2. Step 2: Convert to fraction form
   1,013.37/1,510.69 = 997.57/x
3. Step 3: Cross multiply
   1,013.37x = 1,510.69 × 997.57
4. Step 4: Simplify right side
   1,013.37x = 1,507,019.02
5. Step 5: Solve for x
   x = 1,507,019.02/1,013.37
6. Step 6: Final answer
   x = 1,487.14