Finding the Fourth Proportional to 1,764.55, 2,434.94 and 978.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,764.55 : 2,434.94 = 978.58 : x
2. Step 2: Convert to fraction form
   1,764.55/2,434.94 = 978.58/x
3. Step 3: Cross multiply
   1,764.55x = 2,434.94 × 978.58
4. Step 4: Simplify right side
   1,764.55x = 2,382,778.69
5. Step 5: Solve for x
   x = 2,382,778.69/1,764.55
6. Step 6: Final answer
   x = 1,350.36