Finding the Fourth Proportional to 3,780.29, 5,217.23 and 2,101.86

Step by Step Solution

1. Step 1: Write the proportion equation
   3,780.29 : 5,217.23 = 2,101.86 : x
2. Step 2: Convert to fraction form
   3,780.29/5,217.23 = 2,101.86/x
3. Step 3: Cross multiply
   3,780.29x = 5,217.23 × 2,101.86
4. Step 4: Simplify right side
   3,780.29x = 10,965,892.30
5. Step 5: Solve for x
   x = 10,965,892.30/3,780.29
6. Step 6: Final answer
   x = 2,900.81