Finding the Fourth Proportional to 2,518.40, 3,776.52 and 1,284.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,518.40 : 3,776.52 = 1,284.50 : x
2. Step 2: Convert to fraction form
   2,518.40/3,776.52 = 1,284.50/x
3. Step 3: Cross multiply
   2,518.40x = 3,776.52 × 1,284.50
4. Step 4: Simplify right side
   2,518.40x = 4,850,939.94
5. Step 5: Solve for x
   x = 4,850,939.94/2,518.40
6. Step 6: Final answer
   x = 1,926.20