Finding the Fourth Proportional to 3,881.98, 5,357.17 and 2,113.62

Step by Step Solution

1. Step 1: Write the proportion equation
   3,881.98 : 5,357.17 = 2,113.62 : x
2. Step 2: Convert to fraction form
   3,881.98/5,357.17 = 2,113.62/x
3. Step 3: Cross multiply
   3,881.98x = 5,357.17 × 2,113.62
4. Step 4: Simplify right side
   3,881.98x = 11,323,021.66
5. Step 5: Solve for x
   x = 11,323,021.66/3,881.98
6. Step 6: Final answer
   x = 2,916.82