Finding the Fourth Proportional to 3,980.43, 5,492.89 and 2,211.93

Step by Step Solution

1. Step 1: Write the proportion equation
   3,980.43 : 5,492.89 = 2,211.93 : x
2. Step 2: Convert to fraction form
   3,980.43/5,492.89 = 2,211.93/x
3. Step 3: Cross multiply
   3,980.43x = 5,492.89 × 2,211.93
4. Step 4: Simplify right side
   3,980.43x = 12,149,888.18
5. Step 5: Solve for x
   x = 12,149,888.18/3,980.43
6. Step 6: Final answer
   x = 3,052.41