Finding the Fourth Proportional to 2,448.78, 3,379.27 and 1,386.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,448.78 : 3,379.27 = 1,386.59 : x
2. Step 2: Convert to fraction form
   2,448.78/3,379.27 = 1,386.59/x
3. Step 3: Cross multiply
   2,448.78x = 3,379.27 × 1,386.59
4. Step 4: Simplify right side
   2,448.78x = 4,685,672.74
5. Step 5: Solve for x
   x = 4,685,672.74/2,448.78
6. Step 6: Final answer
   x = 1,913.47