Finding the Fourth Proportional to 1,397.57, 1,929.55 and 867.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,397.57 : 1,929.55 = 867.02 : x
2. Step 2: Convert to fraction form
   1,397.57/1,929.55 = 867.02/x
3. Step 3: Cross multiply
   1,397.57x = 1,929.55 × 867.02
4. Step 4: Simplify right side
   1,397.57x = 1,672,958.44
5. Step 5: Solve for x
   x = 1,672,958.44/1,397.57
6. Step 6: Final answer
   x = 1,197.05