Finding the Fourth Proportional to 3,981.96, 5,495.06 and 2,213.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,981.96 : 5,495.06 = 2,213.72 : x
2. Step 2: Convert to fraction form
   3,981.96/5,495.06 = 2,213.72/x
3. Step 3: Cross multiply
   3,981.96x = 5,495.06 × 2,213.72
4. Step 4: Simplify right side
   3,981.96x = 12,164,524.22
5. Step 5: Solve for x
   x = 12,164,524.22/3,981.96
6. Step 6: Final answer
   x = 3,054.91