Finding the Fourth Proportional to 6,443.67, 8,889.69 and 3,786.87

Step by Step Solution

1. Step 1: Write the proportion equation
   6,443.67 : 8,889.69 = 3,786.87 : x
2. Step 2: Convert to fraction form
   6,443.67/8,889.69 = 3,786.87/x
3. Step 3: Cross multiply
   6,443.67x = 8,889.69 × 3,786.87
4. Step 4: Simplify right side
   6,443.67x = 33,664,100.37
5. Step 5: Solve for x
   x = 33,664,100.37/6,443.67
6. Step 6: Final answer
   x = 5,224.37