Finding the Fourth Proportional to 6,745.62, 10,118.91 and 2,128.50

Step by Step Solution

1. Step 1: Write the proportion equation
   6,745.62 : 10,118.91 = 2,128.50 : x
2. Step 2: Convert to fraction form
   6,745.62/10,118.91 = 2,128.50/x
3. Step 3: Cross multiply
   6,745.62x = 10,118.91 × 2,128.50
4. Step 4: Simplify right side
   6,745.62x = 21,538,099.94
5. Step 5: Solve for x
   x = 21,538,099.94/6,745.62
6. Step 6: Final answer
   x = 3,192.90