Finding the Fourth Proportional to 1,763.89, 2,434.19 and 978.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,763.89 : 2,434.19 = 978.01 : x
2. Step 2: Convert to fraction form
   1,763.89/2,434.19 = 978.01/x
3. Step 3: Cross multiply
   1,763.89x = 2,434.19 × 978.01
4. Step 4: Simplify right side
   1,763.89x = 2,380,662.16
5. Step 5: Solve for x
   x = 2,380,662.16/1,763.89
6. Step 6: Final answer
   x = 1,349.67