Finding the Fourth Proportional to 2,186.83, 3,019.35 and 1,688.68

Step by Step Solution

1. Step 1: Write the proportion equation
   2,186.83 : 3,019.35 = 1,688.68 : x
2. Step 2: Convert to fraction form
   2,186.83/3,019.35 = 1,688.68/x
3. Step 3: Cross multiply
   2,186.83x = 3,019.35 × 1,688.68
4. Step 4: Simplify right side
   2,186.83x = 5,098,715.96
5. Step 5: Solve for x
   x = 5,098,715.96/2,186.83
6. Step 6: Final answer
   x = 2,331.56