Finding the Fourth Proportional to 2,606.86, 3,917.58 and 1,309.24

Step by Step Solution

1. Step 1: Write the proportion equation
   2,606.86 : 3,917.58 = 1,309.24 : x
2. Step 2: Convert to fraction form
   2,606.86/3,917.58 = 1,309.24/x
3. Step 3: Cross multiply
   2,606.86x = 3,917.58 × 1,309.24
4. Step 4: Simplify right side
   2,606.86x = 5,129,052.44
5. Step 5: Solve for x
   x = 5,129,052.44/2,606.86
6. Step 6: Final answer
   x = 1,967.52