Finding the Fourth Proportional to 30,645.12, 42,290.43 and 17,216.94

Step by Step Solution

1. Step 1: Write the proportion equation
   30,645.12 : 42,290.43 = 17,216.94 : x
2. Step 2: Convert to fraction form
   30,645.12/42,290.43 = 17,216.94/x
3. Step 3: Cross multiply
   30,645.12x = 42,290.43 × 17,216.94
4. Step 4: Simplify right side
   30,645.12x = 728,111,795.88
5. Step 5: Solve for x
   x = 728,111,795.88/30,645.12
6. Step 6: Final answer
   x = 23,759.47