Finding the Fourth Proportional to 1,230.56, 1,698.17 and 671.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,230.56 : 1,698.17 = 671.02 : x
2. Step 2: Convert to fraction form
   1,230.56/1,698.17 = 671.02/x
3. Step 3: Cross multiply
   1,230.56x = 1,698.17 × 671.02
4. Step 4: Simplify right side
   1,230.56x = 1,139,498.43
5. Step 5: Solve for x
   x = 1,139,498.43/1,230.56
6. Step 6: Final answer
   x = 926.00