Finding the Fourth Proportional to 2,895.67, 4,343.76 and 815.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,895.67 : 4,343.76 = 815.69 : x
2. Step 2: Convert to fraction form
   2,895.67/4,343.76 = 815.69/x
3. Step 3: Cross multiply
   2,895.67x = 4,343.76 × 815.69
4. Step 4: Simplify right side
   2,895.67x = 3,543,167.02
5. Step 5: Solve for x
   x = 3,543,167.02/2,895.67
6. Step 6: Final answer
   x = 1,223.61