Finding the Fourth Proportional to 1,272.89, 1,756.51 and 705.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,272.89 : 1,756.51 = 705.69 : x
2. Step 2: Convert to fraction form
   1,272.89/1,756.51 = 705.69/x
3. Step 3: Cross multiply
   1,272.89x = 1,756.51 × 705.69
4. Step 4: Simplify right side
   1,272.89x = 1,239,549.78
5. Step 5: Solve for x
   x = 1,239,549.78/1,272.89
6. Step 6: Final answer
   x = 973.81