Finding the Fourth Proportional to 2,361.72, 3,539.70 and 1,061.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,361.72 : 3,539.70 = 1,061.40 : x
2. Step 2: Convert to fraction form
   2,361.72/3,539.70 = 1,061.40/x
3. Step 3: Cross multiply
   2,361.72x = 3,539.70 × 1,061.40
4. Step 4: Simplify right side
   2,361.72x = 3,757,037.58
5. Step 5: Solve for x
   x = 3,757,037.58/2,361.72
6. Step 6: Final answer
   x = 1,590.81