Finding the Fourth Proportional to 4,215.86, 5,819.88 and 3,816.05

Step by Step Solution

1. Step 1: Write the proportion equation
   4,215.86 : 5,819.88 = 3,816.05 : x
2. Step 2: Convert to fraction form
   4,215.86/5,819.88 = 3,816.05/x
3. Step 3: Cross multiply
   4,215.86x = 5,819.88 × 3,816.05
4. Step 4: Simplify right side
   4,215.86x = 22,208,987.39
5. Step 5: Solve for x
   x = 22,208,987.39/4,215.86
6. Step 6: Final answer
   x = 5,267.96