Finding the Fourth Proportional to 1,228.80, 1,695.72 and 704.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,228.80 : 1,695.72 = 704.82 : x
2. Step 2: Convert to fraction form
   1,228.80/1,695.72 = 704.82/x
3. Step 3: Cross multiply
   1,228.80x = 1,695.72 × 704.82
4. Step 4: Simplify right side
   1,228.80x = 1,195,172.33
5. Step 5: Solve for x
   x = 1,195,172.33/1,228.80
6. Step 6: Final answer
   x = 972.64