Finding the Fourth Proportional to 1,274.28, 1,758.69 and 707.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,274.28 : 1,758.69 = 707.24 : x
2. Step 2: Convert to fraction form
   1,274.28/1,758.69 = 707.24/x
3. Step 3: Cross multiply
   1,274.28x = 1,758.69 × 707.24
4. Step 4: Simplify right side
   1,274.28x = 1,243,812.38
5. Step 5: Solve for x
   x = 1,243,812.38/1,274.28
6. Step 6: Final answer
   x = 976.09