Finding the Fourth Proportional to 3,636.89, 5,454.15 and 1,881.68

Step by Step Solution

1. Step 1: Write the proportion equation
   3,636.89 : 5,454.15 = 1,881.68 : x
2. Step 2: Convert to fraction form
   3,636.89/5,454.15 = 1,881.68/x
3. Step 3: Cross multiply
   3,636.89x = 5,454.15 × 1,881.68
4. Step 4: Simplify right side
   3,636.89x = 10,262,937.70
5. Step 5: Solve for x
   x = 10,262,937.70/3,636.89
6. Step 6: Final answer
   x = 2,821.90