Finding the Fourth Proportional to 30,783.42, 42,477.34 and 17,168.28

Step by Step Solution

1. Step 1: Write the proportion equation
   30,783.42 : 42,477.34 = 17,168.28 : x
2. Step 2: Convert to fraction form
   30,783.42/42,477.34 = 17,168.28/x
3. Step 3: Cross multiply
   30,783.42x = 42,477.34 × 17,168.28
4. Step 4: Simplify right side
   30,783.42x = 729,262,866.78
5. Step 5: Solve for x
   x = 729,262,866.78/30,783.42
6. Step 6: Final answer
   x = 23,690.12