Finding the Fourth Proportional to 1,763.99, 2,434.21 and 978.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,763.99 : 2,434.21 = 978.02 : x
2. Step 2: Convert to fraction form
   1,763.99/2,434.21 = 978.02/x
3. Step 3: Cross multiply
   1,763.99x = 2,434.21 × 978.02
4. Step 4: Simplify right side
   1,763.99x = 2,380,706.06
5. Step 5: Solve for x
   x = 2,380,706.06/1,763.99
6. Step 6: Final answer
   x = 1,349.61