Finding the Fourth Proportional to 3,980.95, 5,493.69 and 2,212.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,980.95 : 5,493.69 = 2,212.72 : x
2. Step 2: Convert to fraction form
   3,980.95/5,493.69 = 2,212.72/x
3. Step 3: Cross multiply
   3,980.95x = 5,493.69 × 2,212.72
4. Step 4: Simplify right side
   3,980.95x = 12,155,997.74
5. Step 5: Solve for x
   x = 12,155,997.74/3,980.95
6. Step 6: Final answer
   x = 3,053.54