Finding the Fourth Proportional to 2,086.10, 2,875.50 and 1,643.24

Step by Step Solution

1. Step 1: Write the proportion equation
   2,086.10 : 2,875.50 = 1,643.24 : x
2. Step 2: Convert to fraction form
   2,086.10/2,875.50 = 1,643.24/x
3. Step 3: Cross multiply
   2,086.10x = 2,875.50 × 1,643.24
4. Step 4: Simplify right side
   2,086.10x = 4,725,136.62
5. Step 5: Solve for x
   x = 4,725,136.62/2,086.10
6. Step 6: Final answer
   x = 2,265.06