Finding the Fourth Proportional to 30,619.59, 42,251.77 and 17,192.31

Step by Step Solution

1. Step 1: Write the proportion equation
   30,619.59 : 42,251.77 = 17,192.31 : x
2. Step 2: Convert to fraction form
   30,619.59/42,251.77 = 17,192.31/x
3. Step 3: Cross multiply
   30,619.59x = 42,251.77 × 17,192.31
4. Step 4: Simplify right side
   30,619.59x = 726,405,527.89
5. Step 5: Solve for x
   x = 726,405,527.89/30,619.59
6. Step 6: Final answer
   x = 23,723.56