Finding the Fourth Proportional to 1,014.50, 1,513.90 and 905.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,014.50 : 1,513.90 = 905.16 : x
2. Step 2: Convert to fraction form
   1,014.50/1,513.90 = 905.16/x
3. Step 3: Cross multiply
   1,014.50x = 1,513.90 × 905.16
4. Step 4: Simplify right side
   1,014.50x = 1,370,321.72
5. Step 5: Solve for x
   x = 1,370,321.72/1,014.50
6. Step 6: Final answer
   x = 1,350.74