Finding the Fourth Proportional to 1,985.94, 2,734.37 and 1,686.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,985.94 : 2,734.37 = 1,686.57 : x
2. Step 2: Convert to fraction form
   1,985.94/2,734.37 = 1,686.57/x
3. Step 3: Cross multiply
   1,985.94x = 2,734.37 × 1,686.57
4. Step 4: Simplify right side
   1,985.94x = 4,611,697.98
5. Step 5: Solve for x
   x = 4,611,697.98/1,985.94
6. Step 6: Final answer
   x = 2,322.17