Finding the Fourth Proportional to 2,715.72, 4,074.72 and 1,940.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,715.72 : 4,074.72 = 1,940.72 : x
2. Step 2: Convert to fraction form
   2,715.72/4,074.72 = 1,940.72/x
3. Step 3: Cross multiply
   2,715.72x = 4,074.72 × 1,940.72
4. Step 4: Simplify right side
   2,715.72x = 7,907,890.60
5. Step 5: Solve for x
   x = 7,907,890.60/2,715.72
6. Step 6: Final answer
   x = 2,911.89