Finding the Fourth Proportional to 3,564.45, 4,915.94 and 2,678.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,564.45 : 4,915.94 = 2,678.72 : x
2. Step 2: Convert to fraction form
   3,564.45/4,915.94 = 2,678.72/x
3. Step 3: Cross multiply
   3,564.45x = 4,915.94 × 2,678.72
4. Step 4: Simplify right side
   3,564.45x = 13,168,388.82
5. Step 5: Solve for x
   x = 13,168,388.82/3,564.45
6. Step 6: Final answer
   x = 3,694.37