Finding the Fourth Proportional to 2,308.86, 3,186.36 and 1,720.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,308.86 : 3,186.36 = 1,720.98 : x
2. Step 2: Convert to fraction form
   2,308.86/3,186.36 = 1,720.98/x
3. Step 3: Cross multiply
   2,308.86x = 3,186.36 × 1,720.98
4. Step 4: Simplify right side
   2,308.86x = 5,483,661.83
5. Step 5: Solve for x
   x = 5,483,661.83/2,308.86
6. Step 6: Final answer
   x = 2,375.05