Finding the Fourth Proportional to 1,764.24, 2,434.56 and 978.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,764.24 : 2,434.56 = 978.30 : x
2. Step 2: Convert to fraction form
   1,764.24/2,434.56 = 978.30/x
3. Step 3: Cross multiply
   1,764.24x = 2,434.56 × 978.30
4. Step 4: Simplify right side
   1,764.24x = 2,381,730.05
5. Step 5: Solve for x
   x = 2,381,730.05/1,764.24
6. Step 6: Final answer
   x = 1,350.00