Finding the Fourth Proportional to 3,780.15, 5,216.51 and 2,101.54

Step by Step Solution

1. Step 1: Write the proportion equation
   3,780.15 : 5,216.51 = 2,101.54 : x
2. Step 2: Convert to fraction form
   3,780.15/5,216.51 = 2,101.54/x
3. Step 3: Cross multiply
   3,780.15x = 5,216.51 × 2,101.54
4. Step 4: Simplify right side
   3,780.15x = 10,962,667.84
5. Step 5: Solve for x
   x = 10,962,667.84/3,780.15
6. Step 6: Final answer
   x = 2,900.07