Finding the Fourth Proportional to 30,447.28, 42,019.22 and 17,019.10

Step by Step Solution

1. Step 1: Write the proportion equation
   30,447.28 : 42,019.22 = 17,019.10 : x
2. Step 2: Convert to fraction form
   30,447.28/42,019.22 = 17,019.10/x
3. Step 3: Cross multiply
   30,447.28x = 42,019.22 × 17,019.10
4. Step 4: Simplify right side
   30,447.28x = 715,129,307.10
5. Step 5: Solve for x
   x = 715,129,307.10/30,447.28
6. Step 6: Final answer
   x = 23,487.46