Finding the Fourth Proportional to 2,477.78, 3,419.28 and 1,358.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,477.78 : 3,419.28 = 1,358.71 : x
2. Step 2: Convert to fraction form
   2,477.78/3,419.28 = 1,358.71/x
3. Step 3: Cross multiply
   2,477.78x = 3,419.28 × 1,358.71
4. Step 4: Simplify right side
   2,477.78x = 4,645,809.93
5. Step 5: Solve for x
   x = 4,645,809.93/2,477.78
6. Step 6: Final answer
   x = 1,874.99