Finding the Fourth Proportional to 1,890.15, 2,608.65 and 1,447.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,890.15 : 2,608.65 = 1,447.89 : x
2. Step 2: Convert to fraction form
   1,890.15/2,608.65 = 1,447.89/x
3. Step 3: Cross multiply
   1,890.15x = 2,608.65 × 1,447.89
4. Step 4: Simplify right side
   1,890.15x = 3,777,038.25
5. Step 5: Solve for x
   x = 3,777,038.25/1,890.15
6. Step 6: Final answer
   x = 1,998.27