Finding the Fourth Proportional to 30,960.06, 42,724.50 and 16,813

Step by Step Solution

1. Step 1: Write the proportion equation
   30,960.06 : 42,724.50 = 16,813 : x
2. Step 2: Convert to fraction form
   30,960.06/42,724.50 = 16,813/x
3. Step 3: Cross multiply
   30,960.06x = 42,724.50 × 16,813
4. Step 4: Simplify right side
   30,960.06x = 718,327,018.50
5. Step 5: Solve for x
   x = 718,327,018.50/30,960.06
6. Step 6: Final answer
   x = 23,201.73