Finding the Fourth Proportional to 2,518.80, 3,774.48 and 1,218.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,518.80 : 3,774.48 = 1,218.72 : x
2. Step 2: Convert to fraction form
   2,518.80/3,774.48 = 1,218.72/x
3. Step 3: Cross multiply
   2,518.80x = 3,774.48 × 1,218.72
4. Step 4: Simplify right side
   2,518.80x = 4,600,034.27
5. Step 5: Solve for x
   x = 4,600,034.27/2,518.80
6. Step 6: Final answer
   x = 1,826.28