Finding the Fourth Proportional to 2,678.72, 3,696.78 and 1,683.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,678.72 : 3,696.78 = 1,683.63 : x
2. Step 2: Convert to fraction form
   2,678.72/3,696.78 = 1,683.63/x
3. Step 3: Cross multiply
   2,678.72x = 3,696.78 × 1,683.63
4. Step 4: Simplify right side
   2,678.72x = 6,224,009.71
5. Step 5: Solve for x
   x = 6,224,009.71/2,678.72
6. Step 6: Final answer
   x = 2,323.50