Finding the Fourth Proportional to 1,727.11, 2,380.56 and 1,222.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,727.11 : 2,380.56 = 1,222.31 : x
2. Step 2: Convert to fraction form
   1,727.11/2,380.56 = 1,222.31/x
3. Step 3: Cross multiply
   1,727.11x = 2,380.56 × 1,222.31
4. Step 4: Simplify right side
   1,727.11x = 2,909,775.43
5. Step 5: Solve for x
   x = 2,909,775.43/1,727.11
6. Step 6: Final answer
   x = 1,684.77