Finding the Fourth Proportional to 30,882.72, 42,609.60 and 19,706.88

Step by Step Solution

1. Step 1: Write the proportion equation
   30,882.72 : 42,609.60 = 19,706.88 : x
2. Step 2: Convert to fraction form
   30,882.72/42,609.60 = 19,706.88/x
3. Step 3: Cross multiply
   30,882.72x = 42,609.60 × 19,706.88
4. Step 4: Simplify right side
   30,882.72x = 839,702,274.05
5. Step 5: Solve for x
   x = 839,702,274.05/30,882.72
6. Step 6: Final answer
   x = 27,190.04