Finding the Fourth Proportional to 2,308.86, 3,186.23 and 1,646.87

Step by Step Solution

1. Step 1: Write the proportion equation
   2,308.86 : 3,186.23 = 1,646.87 : x
2. Step 2: Convert to fraction form
   2,308.86/3,186.23 = 1,646.87/x
3. Step 3: Cross multiply
   2,308.86x = 3,186.23 × 1,646.87
4. Step 4: Simplify right side
   2,308.86x = 5,247,282.43
5. Step 5: Solve for x
   x = 5,247,282.43/2,308.86
6. Step 6: Final answer
   x = 2,272.67