Finding the Fourth Proportional to 1,764.89, 2,435.56 and 978.92

Step by Step Solution

1. Step 1: Write the proportion equation
   1,764.89 : 2,435.56 = 978.92 : x
2. Step 2: Convert to fraction form
   1,764.89/2,435.56 = 978.92/x
3. Step 3: Cross multiply
   1,764.89x = 2,435.56 × 978.92
4. Step 4: Simplify right side
   1,764.89x = 2,384,203.77
5. Step 5: Solve for x
   x = 2,384,203.77/1,764.89
6. Step 6: Final answer
   x = 1,350.91