Finding the Fourth Proportional to 1,274.21, 1,758.59 and 707.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,274.21 : 1,758.59 = 707.18 : x
2. Step 2: Convert to fraction form
   1,274.21/1,758.59 = 707.18/x
3. Step 3: Cross multiply
   1,274.21x = 1,758.59 × 707.18
4. Step 4: Simplify right side
   1,274.21x = 1,243,632.65
5. Step 5: Solve for x
   x = 1,243,632.65/1,274.21
6. Step 6: Final answer
   x = 976.00