Finding the Fourth Proportional to 2,751.58, 4,128.45 and 1,211.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,751.58 : 4,128.45 = 1,211.50 : x
2. Step 2: Convert to fraction form
   2,751.58/4,128.45 = 1,211.50/x
3. Step 3: Cross multiply
   2,751.58x = 4,128.45 × 1,211.50
4. Step 4: Simplify right side
   2,751.58x = 5,001,617.18
5. Step 5: Solve for x
   x = 5,001,617.18/2,751.58
6. Step 6: Final answer
   x = 1,817.73