Finding the Fourth Proportional to 1,019.43, 1,407.15 and 930.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,019.43 : 1,407.15 = 930.23 : x
2. Step 2: Convert to fraction form
   1,019.43/1,407.15 = 930.23/x
3. Step 3: Cross multiply
   1,019.43x = 1,407.15 × 930.23
4. Step 4: Simplify right side
   1,019.43x = 1,308,976.65
5. Step 5: Solve for x
   x = 1,308,976.65/1,019.43
6. Step 6: Final answer
   x = 1,284.02