Finding the Fourth Proportional to 1,397.15, 2,092.54 and 667.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,397.15 : 2,092.54 = 667.25 : x
2. Step 2: Convert to fraction form
   1,397.15/2,092.54 = 667.25/x
3. Step 3: Cross multiply
   1,397.15x = 2,092.54 × 667.25
4. Step 4: Simplify right side
   1,397.15x = 1,396,235.18
5. Step 5: Solve for x
   x = 1,396,235.18/1,397.15
6. Step 6: Final answer
   x = 999.34