Finding the Fourth Proportional to 1,230.27, 1,697.71 and 670.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,230.27 : 1,697.71 = 670.74 : x
2. Step 2: Convert to fraction form
   1,230.27/1,697.71 = 670.74/x
3. Step 3: Cross multiply
   1,230.27x = 1,697.71 × 670.74
4. Step 4: Simplify right side
   1,230.27x = 1,138,722.01
5. Step 5: Solve for x
   x = 1,138,722.01/1,230.27
6. Step 6: Final answer
   x = 925.59