Finding the Fourth Proportional to 3,780.18, 5,216.49 and 2,101.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,780.18 : 5,216.49 = 2,101.50 : x
2. Step 2: Convert to fraction form
   3,780.18/5,216.49 = 2,101.50/x
3. Step 3: Cross multiply
   3,780.18x = 5,216.49 × 2,101.50
4. Step 4: Simplify right side
   3,780.18x = 10,962,453.74
5. Step 5: Solve for x
   x = 10,962,453.74/3,780.18
6. Step 6: Final answer
   x = 2,899.98