Finding the Fourth Proportional to 6,735.72, 10,105.20 and 2,118.72

Step by Step Solution

1. Step 1: Write the proportion equation
   6,735.72 : 10,105.20 = 2,118.72 : x
2. Step 2: Convert to fraction form
   6,735.72/10,105.20 = 2,118.72/x
3. Step 3: Cross multiply
   6,735.72x = 10,105.20 × 2,118.72
4. Step 4: Simplify right side
   6,735.72x = 21,410,089.34
5. Step 5: Solve for x
   x = 21,410,089.34/6,735.72
6. Step 6: Final answer
   x = 3,178.59