Finding the Fourth Proportional to 1,764.61, 2,435.27 and 978.66

Step by Step Solution

1. Step 1: Write the proportion equation
   1,764.61 : 2,435.27 = 978.66 : x
2. Step 2: Convert to fraction form
   1,764.61/2,435.27 = 978.66/x
3. Step 3: Cross multiply
   1,764.61x = 2,435.27 × 978.66
4. Step 4: Simplify right side
   1,764.61x = 2,383,301.34
5. Step 5: Solve for x
   x = 2,383,301.34/1,764.61
6. Step 6: Final answer
   x = 1,350.61