Finding the Fourth Proportional to 30,449.74, 42,015.51 and 17,021.10

Step by Step Solution

1. Step 1: Write the proportion equation
   30,449.74 : 42,015.51 = 17,021.10 : x
2. Step 2: Convert to fraction form
   30,449.74/42,015.51 = 17,021.10/x
3. Step 3: Cross multiply
   30,449.74x = 42,015.51 × 17,021.10
4. Step 4: Simplify right side
   30,449.74x = 715,150,354.82
5. Step 5: Solve for x
   x = 715,150,354.82/30,449.74
6. Step 6: Final answer
   x = 23,486.26