Finding the Fourth Proportional to 1,686.70, 2,329.86 and 1,293.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,686.70 : 2,329.86 = 1,293.04 : x
2. Step 2: Convert to fraction form
   1,686.70/2,329.86 = 1,293.04/x
3. Step 3: Cross multiply
   1,686.70x = 2,329.86 × 1,293.04
4. Step 4: Simplify right side
   1,686.70x = 3,012,602.17
5. Step 5: Solve for x
   x = 3,012,602.17/1,686.70
6. Step 6: Final answer
   x = 1,786.09