Finding the Fourth Proportional to 1,789.29, 2,663.89 and 1,780.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,789.29 : 2,663.89 = 1,780.63 : x
2. Step 2: Convert to fraction form
   1,789.29/2,663.89 = 1,780.63/x
3. Step 3: Cross multiply
   1,789.29x = 2,663.89 × 1,780.63
4. Step 4: Simplify right side
   1,789.29x = 4,743,391.34
5. Step 5: Solve for x
   x = 4,743,391.34/1,789.29
6. Step 6: Final answer
   x = 2,650.99