Finding the Fourth Proportional to 1,764.07, 2,434.26 and 978.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,764.07 : 2,434.26 = 978.10 : x
2. Step 2: Convert to fraction form
   1,764.07/2,434.26 = 978.10/x
3. Step 3: Cross multiply
   1,764.07x = 2,434.26 × 978.10
4. Step 4: Simplify right side
   1,764.07x = 2,380,949.71
5. Step 5: Solve for x
   x = 2,380,949.71/1,764.07
6. Step 6: Final answer
   x = 1,349.69