Finding the Fourth Proportional to 3,981.98, 5,495.10 and 2,213.58

Step by Step Solution

1. Step 1: Write the proportion equation
   3,981.98 : 5,495.10 = 2,213.58 : x
2. Step 2: Convert to fraction form
   3,981.98/5,495.10 = 2,213.58/x
3. Step 3: Cross multiply
   3,981.98x = 5,495.10 × 2,213.58
4. Step 4: Simplify right side
   3,981.98x = 12,163,843.46
5. Step 5: Solve for x
   x = 12,163,843.46/3,981.98
6. Step 6: Final answer
   x = 3,054.72