Finding the Fourth Proportional to 3,869.94, 5,806.35 and 1,816.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,869.94 : 5,806.35 = 1,816.50 : x
2. Step 2: Convert to fraction form
   3,869.94/5,806.35 = 1,816.50/x
3. Step 3: Cross multiply
   3,869.94x = 5,806.35 × 1,816.50
4. Step 4: Simplify right side
   3,869.94x = 10,547,234.78
5. Step 5: Solve for x
   x = 10,547,234.78/3,869.94
6. Step 6: Final answer
   x = 2,725.43