Finding the Fourth Proportional to 30,971.82, 42,739 and 16,824.36

Step by Step Solution

1. Step 1: Write the proportion equation
   30,971.82 : 42,739 = 16,824.36 : x
2. Step 2: Convert to fraction form
   30,971.82/42,739 = 16,824.36/x
3. Step 3: Cross multiply
   30,971.82x = 42,739 × 16,824.36
4. Step 4: Simplify right side
   30,971.82x = 719,056,322.04
5. Step 5: Solve for x
   x = 719,056,322.04/30,971.82
6. Step 6: Final answer
   x = 23,216.47