Finding the Fourth Proportional to 2,590.46, 3,880.49 and 1,201.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,590.46 : 3,880.49 = 1,201.89 : x
2. Step 2: Convert to fraction form
   2,590.46/3,880.49 = 1,201.89/x
3. Step 3: Cross multiply
   2,590.46x = 3,880.49 × 1,201.89
4. Step 4: Simplify right side
   2,590.46x = 4,663,916.12
5. Step 5: Solve for x
   x = 4,663,916.12/2,590.46
6. Step 6: Final answer
   x = 1,800.42