Finding the Fourth Proportional to 2,715.34, 4,072.38 and 866.62

Step by Step Solution

1. Step 1: Write the proportion equation
   2,715.34 : 4,072.38 = 866.62 : x
2. Step 2: Convert to fraction form
   2,715.34/4,072.38 = 866.62/x
3. Step 3: Cross multiply
   2,715.34x = 4,072.38 × 866.62
4. Step 4: Simplify right side
   2,715.34x = 3,529,205.96
5. Step 5: Solve for x
   x = 3,529,205.96/2,715.34
6. Step 6: Final answer
   x = 1,299.73