Finding the Fourth Proportional to 30,489.27, 42,070.17 and 19,150.69

Step by Step Solution

1. Step 1: Write the proportion equation
   30,489.27 : 42,070.17 = 19,150.69 : x
2. Step 2: Convert to fraction form
   30,489.27/42,070.17 = 19,150.69/x
3. Step 3: Cross multiply
   30,489.27x = 42,070.17 × 19,150.69
4. Step 4: Simplify right side
   30,489.27x = 805,672,477.81
5. Step 5: Solve for x
   x = 805,672,477.81/30,489.27
6. Step 6: Final answer
   x = 26,424.79