Finding the Fourth Proportional to 3,890.16, 5,819.88 and 3,005.76

Step by Step Solution

1. Step 1: Write the proportion equation
   3,890.16 : 5,819.88 = 3,005.76 : x
2. Step 2: Convert to fraction form
   3,890.16/5,819.88 = 3,005.76/x
3. Step 3: Cross multiply
   3,890.16x = 5,819.88 × 3,005.76
4. Step 4: Simplify right side
   3,890.16x = 17,493,162.51
5. Step 5: Solve for x
   x = 17,493,162.51/3,890.16
6. Step 6: Final answer
   x = 4,496.77