Finding the Fourth Proportional to 1,764.46, 2,434.97 and 978.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,764.46 : 2,434.97 = 978.50 : x
2. Step 2: Convert to fraction form
   1,764.46/2,434.97 = 978.50/x
3. Step 3: Cross multiply
   1,764.46x = 2,434.97 × 978.50
4. Step 4: Simplify right side
   1,764.46x = 2,382,618.15
5. Step 5: Solve for x
   x = 2,382,618.15/1,764.46
6. Step 6: Final answer
   x = 1,350.34