Finding the Fourth Proportional to 2,128.68, 2,930.63 and 1,679.73

Step by Step Solution

1. Step 1: Write the proportion equation
   2,128.68 : 2,930.63 = 1,679.73 : x
2. Step 2: Convert to fraction form
   2,128.68/2,930.63 = 1,679.73/x
3. Step 3: Cross multiply
   2,128.68x = 2,930.63 × 1,679.73
4. Step 4: Simplify right side
   2,128.68x = 4,922,667.13
5. Step 5: Solve for x
   x = 4,922,667.13/2,128.68
6. Step 6: Final answer
   x = 2,312.54