Finding the Fourth Proportional to 3,648.72, 5,035.20 and 2,076.90

Step by Step Solution

1. Step 1: Write the proportion equation
   3,648.72 : 5,035.20 = 2,076.90 : x
2. Step 2: Convert to fraction form
   3,648.72/5,035.20 = 2,076.90/x
3. Step 3: Cross multiply
   3,648.72x = 5,035.20 × 2,076.90
4. Step 4: Simplify right side
   3,648.72x = 10,457,606.88
5. Step 5: Solve for x
   x = 10,457,606.88/3,648.72
6. Step 6: Final answer
   x = 2,866.10