Finding the Fourth Proportional to 2,086.22, 2,878.34 and 1,201.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,086.22 : 2,878.34 = 1,201.91 : x
2. Step 2: Convert to fraction form
   2,086.22/2,878.34 = 1,201.91/x
3. Step 3: Cross multiply
   2,086.22x = 2,878.34 × 1,201.91
4. Step 4: Simplify right side
   2,086.22x = 3,459,485.23
5. Step 5: Solve for x
   x = 3,459,485.23/2,086.22
6. Step 6: Final answer
   x = 1,658.25