Finding the Fourth Proportional to 1,229.83, 1,697.15 and 670.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,229.83 : 1,697.15 = 670.31 : x
2. Step 2: Convert to fraction form
   1,229.83/1,697.15 = 670.31/x
3. Step 3: Cross multiply
   1,229.83x = 1,697.15 × 670.31
4. Step 4: Simplify right side
   1,229.83x = 1,137,616.17
5. Step 5: Solve for x
   x = 1,137,616.17/1,229.83
6. Step 6: Final answer
   x = 925.02