Finding the Fourth Proportional to 1,978.51, 2,967.09 and 808.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,978.51 : 2,967.09 = 808.33 : x
2. Step 2: Convert to fraction form
   1,978.51/2,967.09 = 808.33/x
3. Step 3: Cross multiply
   1,978.51x = 2,967.09 × 808.33
4. Step 4: Simplify right side
   1,978.51x = 2,398,387.86
5. Step 5: Solve for x
   x = 2,398,387.86/1,978.51
6. Step 6: Final answer
   x = 1,212.22