Finding the Fourth Proportional to 2,577.86, 3,870.39 and 1,329.51

Step by Step Solution

1. Step 1: Write the proportion equation
   2,577.86 : 3,870.39 = 1,329.51 : x
2. Step 2: Convert to fraction form
   2,577.86/3,870.39 = 1,329.51/x
3. Step 3: Cross multiply
   2,577.86x = 3,870.39 × 1,329.51
4. Step 4: Simplify right side
   2,577.86x = 5,145,722.21
5. Step 5: Solve for x
   x = 5,145,722.21/2,577.86
6. Step 6: Final answer
   x = 1,996.13