Finding the Fourth Proportional to 1,684.31, 2,321.82 and 1,286.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,684.31 : 2,321.82 = 1,286.06 : x
2. Step 2: Convert to fraction form
   1,684.31/2,321.82 = 1,286.06/x
3. Step 3: Cross multiply
   1,684.31x = 2,321.82 × 1,286.06
4. Step 4: Simplify right side
   1,684.31x = 2,985,988.22
5. Step 5: Solve for x
   x = 2,985,988.22/1,684.31
6. Step 6: Final answer
   x = 1,772.83