Finding the Fourth Proportional to 30,631.42, 42,266.82 and 17,200.72

Step by Step Solution

1. Step 1: Write the proportion equation
   30,631.42 : 42,266.82 = 17,200.72 : x
2. Step 2: Convert to fraction form
   30,631.42/42,266.82 = 17,200.72/x
3. Step 3: Cross multiply
   30,631.42x = 42,266.82 × 17,200.72
4. Step 4: Simplify right side
   30,631.42x = 727,019,736.11
5. Step 5: Solve for x
   x = 727,019,736.11/30,631.42
6. Step 6: Final answer
   x = 23,734.44