Finding the Fourth Proportional to 30,659.48, 42,310.04 and 17,921.42

Step by Step Solution

1. Step 1: Write the proportion equation
   30,659.48 : 42,310.04 = 17,921.42 : x
2. Step 2: Convert to fraction form
   30,659.48/42,310.04 = 17,921.42/x
3. Step 3: Cross multiply
   30,659.48x = 42,310.04 × 17,921.42
4. Step 4: Simplify right side
   30,659.48x = 758,255,997.06
5. Step 5: Solve for x
   x = 758,255,997.06/30,659.48
6. Step 6: Final answer
   x = 24,731.53