Finding the Fourth Proportional to 3,478.91, 5,216.72 and 2,018.51

Step by Step Solution

1. Step 1: Write the proportion equation
   3,478.91 : 5,216.72 = 2,018.51 : x
2. Step 2: Convert to fraction form
   3,478.91/5,216.72 = 2,018.51/x
3. Step 3: Cross multiply
   3,478.91x = 5,216.72 × 2,018.51
4. Step 4: Simplify right side
   3,478.91x = 10,529,991.39
5. Step 5: Solve for x
   x = 10,529,991.39/3,478.91
6. Step 6: Final answer
   x = 3,026.81