Finding the Fourth Proportional to 2,160.31, 3,241.24 and 1,065.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,160.31 : 3,241.24 = 1,065.45 : x
2. Step 2: Convert to fraction form
   2,160.31/3,241.24 = 1,065.45/x
3. Step 3: Cross multiply
   2,160.31x = 3,241.24 × 1,065.45
4. Step 4: Simplify right side
   2,160.31x = 3,453,381.93
5. Step 5: Solve for x
   x = 3,453,381.93/2,160.31
6. Step 6: Final answer
   x = 1,598.56