Finding the Fourth Proportional to 1,764.65, 2,435.24 and 978.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,764.65 : 2,435.24 = 978.71 : x
2. Step 2: Convert to fraction form
   1,764.65/2,435.24 = 978.71/x
3. Step 3: Cross multiply
   1,764.65x = 2,435.24 × 978.71
4. Step 4: Simplify right side
   1,764.65x = 2,383,384.01
5. Step 5: Solve for x
   x = 2,383,384.01/1,764.65
6. Step 6: Final answer
   x = 1,350.63