Finding the Fourth Proportional to 30,669.72, 42,325.88 and 17,059.20

Step by Step Solution

1. Step 1: Write the proportion equation
   30,669.72 : 42,325.88 = 17,059.20 : x
2. Step 2: Convert to fraction form
   30,669.72/42,325.88 = 17,059.20/x
3. Step 3: Cross multiply
   30,669.72x = 42,325.88 × 17,059.20
4. Step 4: Simplify right side
   30,669.72x = 722,045,652.10
5. Step 5: Solve for x
   x = 722,045,652.10/30,669.72
6. Step 6: Final answer
   x = 23,542.62