Finding the Fourth Proportional to 3,680.63, 5,078.86 and 2,109.03

Step by Step Solution

1. Step 1: Write the proportion equation
   3,680.63 : 5,078.86 = 2,109.03 : x
2. Step 2: Convert to fraction form
   3,680.63/5,078.86 = 2,109.03/x
3. Step 3: Cross multiply
   3,680.63x = 5,078.86 × 2,109.03
4. Step 4: Simplify right side
   3,680.63x = 10,711,468.11
5. Step 5: Solve for x
   x = 10,711,468.11/3,680.63
6. Step 6: Final answer
   x = 2,910.23