Finding the Fourth Proportional to 2,007.52, 2,770.35 and 1,221.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,007.52 : 2,770.35 = 1,221.82 : x
2. Step 2: Convert to fraction form
   2,007.52/2,770.35 = 1,221.82/x
3. Step 3: Cross multiply
   2,007.52x = 2,770.35 × 1,221.82
4. Step 4: Simplify right side
   2,007.52x = 3,384,869.04
5. Step 5: Solve for x
   x = 3,384,869.04/2,007.52
6. Step 6: Final answer
   x = 1,686.09