Finding the Fourth Proportional to 1,763.92, 2,434.31 and 978.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,763.92 : 2,434.31 = 978.04 : x
2. Step 2: Convert to fraction form
   1,763.92/2,434.31 = 978.04/x
3. Step 3: Cross multiply
   1,763.92x = 2,434.31 × 978.04
4. Step 4: Simplify right side
   1,763.92x = 2,380,852.55
5. Step 5: Solve for x
   x = 2,380,852.55/1,763.92
6. Step 6: Final answer
   x = 1,349.75