Finding the Fourth Proportional to 1,228.84, 1,695.72 and 705.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,228.84 : 1,695.72 = 705.04 : x
2. Step 2: Convert to fraction form
   1,228.84/1,695.72 = 705.04/x
3. Step 3: Cross multiply
   1,228.84x = 1,695.72 × 705.04
4. Step 4: Simplify right side
   1,228.84x = 1,195,550.43
5. Step 5: Solve for x
   x = 1,195,550.43/1,228.84
6. Step 6: Final answer
   x = 972.91