Finding the Fourth Proportional to 1,789.72, 2,472.82 and 1,591.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,789.72 : 2,472.82 = 1,591.50 : x
2. Step 2: Convert to fraction form
   1,789.72/2,472.82 = 1,591.50/x
3. Step 3: Cross multiply
   1,789.72x = 2,472.82 × 1,591.50
4. Step 4: Simplify right side
   1,789.72x = 3,935,493.03
5. Step 5: Solve for x
   x = 3,935,493.03/1,789.72
6. Step 6: Final answer
   x = 2,198.94