Finding the Fourth Proportional to 1,229.86, 1,696.72 and 705.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,229.86 : 1,696.72 = 705.61 : x
2. Step 2: Convert to fraction form
   1,229.86/1,696.72 = 705.61/x
3. Step 3: Cross multiply
   1,229.86x = 1,696.72 × 705.61
4. Step 4: Simplify right side
   1,229.86x = 1,197,210.59
5. Step 5: Solve for x
   x = 1,197,210.59/1,229.86
6. Step 6: Final answer
   x = 973.46