Finding the Fourth Proportional to 2,286.50, 3,153.05 and 1,865.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,286.50 : 3,153.05 = 1,865.50 : x
2. Step 2: Convert to fraction form
   2,286.50/3,153.05 = 1,865.50/x
3. Step 3: Cross multiply
   2,286.50x = 3,153.05 × 1,865.50
4. Step 4: Simplify right side
   2,286.50x = 5,881,999.01
5. Step 5: Solve for x
   x = 5,881,999.01/2,286.50
6. Step 6: Final answer
   x = 2,572.50