Finding the Fourth Proportional to 2,864.50, 3,953.01 and 1,686.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,864.50 : 3,953.01 = 1,686.30 : x
2. Step 2: Convert to fraction form
   2,864.50/3,953.01 = 1,686.30/x
3. Step 3: Cross multiply
   2,864.50x = 3,953.01 × 1,686.30
4. Step 4: Simplify right side
   2,864.50x = 6,665,960.76
5. Step 5: Solve for x
   x = 6,665,960.76/2,864.50
6. Step 6: Final answer
   x = 2,327.09