Finding the Fourth Proportional to 30,680.96, 42,336.49 and 17,066.78

Step by Step Solution

1. Step 1: Write the proportion equation
   30,680.96 : 42,336.49 = 17,066.78 : x
2. Step 2: Convert to fraction form
   30,680.96/42,336.49 = 17,066.78/x
3. Step 3: Cross multiply
   30,680.96x = 42,336.49 × 17,066.78
4. Step 4: Simplify right side
   30,680.96x = 722,547,735.36
5. Step 5: Solve for x
   x = 722,547,735.36/30,680.96
6. Step 6: Final answer
   x = 23,550.36