Finding the Fourth Proportional to 1,978.24, 2,968.44 and 808.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,978.24 : 2,968.44 = 808.88 : x
2. Step 2: Convert to fraction form
   1,978.24/2,968.44 = 808.88/x
3. Step 3: Cross multiply
   1,978.24x = 2,968.44 × 808.88
4. Step 4: Simplify right side
   1,978.24x = 2,401,111.75
5. Step 5: Solve for x
   x = 2,401,111.75/1,978.24
6. Step 6: Final answer
   x = 1,213.76