Finding the Fourth Proportional to 2,017.22, 2,784.09 and 1,387.22

Step by Step Solution

1. Step 1: Write the proportion equation
   2,017.22 : 2,784.09 = 1,387.22 : x
2. Step 2: Convert to fraction form
   2,017.22/2,784.09 = 1,387.22/x
3. Step 3: Cross multiply
   2,017.22x = 2,784.09 × 1,387.22
4. Step 4: Simplify right side
   2,017.22x = 3,862,145.33
5. Step 5: Solve for x
   x = 3,862,145.33/2,017.22
6. Step 6: Final answer
   x = 1,914.59