Finding the Fourth Proportional to 1,229.98, 1,697.37 and 670.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,229.98 : 1,697.37 = 670.45 : x
2. Step 2: Convert to fraction form
   1,229.98/1,697.37 = 670.45/x
3. Step 3: Cross multiply
   1,229.98x = 1,697.37 × 670.45
4. Step 4: Simplify right side
   1,229.98x = 1,138,001.72
5. Step 5: Solve for x
   x = 1,138,001.72/1,229.98
6. Step 6: Final answer
   x = 925.22