Finding the Fourth Proportional to 1,256.96, 1,734.72 and 704.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,256.96 : 1,734.72 = 704.96 : x
2. Step 2: Convert to fraction form
   1,256.96/1,734.72 = 704.96/x
3. Step 3: Cross multiply
   1,256.96x = 1,734.72 × 704.96
4. Step 4: Simplify right side
   1,256.96x = 1,222,908.21
5. Step 5: Solve for x
   x = 1,222,908.21/1,256.96
6. Step 6: Final answer
   x = 972.91