Finding the Fourth Proportional to 1,738.72, 2,611.68 and 1,680.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,738.72 : 2,611.68 = 1,680.40 : x
2. Step 2: Convert to fraction form
   1,738.72/2,611.68 = 1,680.40/x
3. Step 3: Cross multiply
   1,738.72x = 2,611.68 × 1,680.40
4. Step 4: Simplify right side
   1,738.72x = 4,388,667.07
5. Step 5: Solve for x
   x = 4,388,667.07/1,738.72
6. Step 6: Final answer
   x = 2,524.08