Finding the Fourth Proportional to 1,230.89, 1,698.45 and 706.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,230.89 : 1,698.45 = 706.82 : x
2. Step 2: Convert to fraction form
   1,230.89/1,698.45 = 706.82/x
3. Step 3: Cross multiply
   1,230.89x = 1,698.45 × 706.82
4. Step 4: Simplify right side
   1,230.89x = 1,200,498.43
5. Step 5: Solve for x
   x = 1,200,498.43/1,230.89
6. Step 6: Final answer
   x = 975.31