Finding the Fourth Proportional to 2,160.89, 3,241.31 and 1,430.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,160.89 : 3,241.31 = 1,430.30 : x
2. Step 2: Convert to fraction form
   2,160.89/3,241.31 = 1,430.30/x
3. Step 3: Cross multiply
   2,160.89x = 3,241.31 × 1,430.30
4. Step 4: Simplify right side
   2,160.89x = 4,636,022.33
5. Step 5: Solve for x
   x = 4,636,022.33/2,160.89
6. Step 6: Final answer
   x = 2,145.43