Finding the Fourth Proportional to 1,764.53, 2,435.01 and 978.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,764.53 : 2,435.01 = 978.58 : x
2. Step 2: Convert to fraction form
   1,764.53/2,435.01 = 978.58/x
3. Step 3: Cross multiply
   1,764.53x = 2,435.01 × 978.58
4. Step 4: Simplify right side
   1,764.53x = 2,382,852.09
5. Step 5: Solve for x
   x = 2,382,852.09/1,764.53
6. Step 6: Final answer
   x = 1,350.42