Finding the Fourth Proportional to 30,859.89, 42,586.56 and 16,712.70

Step by Step Solution

1. Step 1: Write the proportion equation
   30,859.89 : 42,586.56 = 16,712.70 : x
2. Step 2: Convert to fraction form
   30,859.89/42,586.56 = 16,712.70/x
3. Step 3: Cross multiply
   30,859.89x = 42,586.56 × 16,712.70
4. Step 4: Simplify right side
   30,859.89x = 711,736,401.31
5. Step 5: Solve for x
   x = 711,736,401.31/30,859.89
6. Step 6: Final answer
   x = 23,063.48