Finding the Fourth Proportional to 3,980.47, 5,492.94 and 2,212.03

Step by Step Solution

1. Step 1: Write the proportion equation
   3,980.47 : 5,492.94 = 2,212.03 : x
2. Step 2: Convert to fraction form
   3,980.47/5,492.94 = 2,212.03/x
3. Step 3: Cross multiply
   3,980.47x = 5,492.94 × 2,212.03
4. Step 4: Simplify right side
   3,980.47x = 12,150,548.07
5. Step 5: Solve for x
   x = 12,150,548.07/3,980.47
6. Step 6: Final answer
   x = 3,052.54