Finding the Fourth Proportional to 1,290.72, 1,781.18 and 701.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,290.72 : 1,781.18 = 701.25 : x
2. Step 2: Convert to fraction form
   1,290.72/1,781.18 = 701.25/x
3. Step 3: Cross multiply
   1,290.72x = 1,781.18 × 701.25
4. Step 4: Simplify right side
   1,290.72x = 1,249,052.48
5. Step 5: Solve for x
   x = 1,249,052.48/1,290.72
6. Step 6: Final answer
   x = 967.72