Finding the Fourth Proportional to 1,682.37, 2,525.89 and 861.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,682.37 : 2,525.89 = 861.21 : x
2. Step 2: Convert to fraction form
   1,682.37/2,525.89 = 861.21/x
3. Step 3: Cross multiply
   1,682.37x = 2,525.89 × 861.21
4. Step 4: Simplify right side
   1,682.37x = 2,175,309.10
5. Step 5: Solve for x
   x = 2,175,309.10/1,682.37
6. Step 6: Final answer
   x = 1,293.01