Finding the Fourth Proportional to 2,654.48, 3,978.72 and 1,266.68

Step by Step Solution

1. Step 1: Write the proportion equation
   2,654.48 : 3,978.72 = 1,266.68 : x
2. Step 2: Convert to fraction form
   2,654.48/3,978.72 = 1,266.68/x
3. Step 3: Cross multiply
   2,654.48x = 3,978.72 × 1,266.68
4. Step 4: Simplify right side
   2,654.48x = 5,039,765.05
5. Step 5: Solve for x
   x = 5,039,765.05/2,654.48
6. Step 6: Final answer
   x = 1,898.59