Finding the Fourth Proportional to 2,751, 4,128.30 and 1,212

Step by Step Solution

1. Step 1: Write the proportion equation
   2,751 : 4,128.30 = 1,212 : x
2. Step 2: Convert to fraction form
   2,751/4,128.30 = 1,212/x
3. Step 3: Cross multiply
   2,751x = 4,128.30 × 1,212
4. Step 4: Simplify right side
   2,751x = 5,003,499.60
5. Step 5: Solve for x
   x = 5,003,499.60/2,751
6. Step 6: Final answer
   x = 1,818.79