Finding the Fourth Proportional to 2,895.50, 4,342.61 and 815.62

Step by Step Solution

1. Step 1: Write the proportion equation
   2,895.50 : 4,342.61 = 815.62 : x
2. Step 2: Convert to fraction form
   2,895.50/4,342.61 = 815.62/x
3. Step 3: Cross multiply
   2,895.50x = 4,342.61 × 815.62
4. Step 4: Simplify right side
   2,895.50x = 3,541,918.89
5. Step 5: Solve for x
   x = 3,541,918.89/2,895.50
6. Step 6: Final answer
   x = 1,223.25