Finding the Fourth Proportional to 2,021.61, 2,789.55 and 1,182.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,021.61 : 2,789.55 = 1,182.45 : x
2. Step 2: Convert to fraction form
   2,021.61/2,789.55 = 1,182.45/x
3. Step 3: Cross multiply
   2,021.61x = 2,789.55 × 1,182.45
4. Step 4: Simplify right side
   2,021.61x = 3,298,503.40
5. Step 5: Solve for x
   x = 3,298,503.40/2,021.61
6. Step 6: Final answer
   x = 1,631.62