Finding the Fourth Proportional to 1,764.67, 2,434.96 and 978.70

Step by Step Solution

1. Step 1: Write the proportion equation
   1,764.67 : 2,434.96 = 978.70 : x
2. Step 2: Convert to fraction form
   1,764.67/2,434.96 = 978.70/x
3. Step 3: Cross multiply
   1,764.67x = 2,434.96 × 978.70
4. Step 4: Simplify right side
   1,764.67x = 2,383,095.35
5. Step 5: Solve for x
   x = 2,383,095.35/1,764.67
6. Step 6: Final answer
   x = 1,350.45