Finding the Fourth Proportional to 30,971.83, 42,739 and 16,824.37

Step by Step Solution

1. Step 1: Write the proportion equation
   30,971.83 : 42,739 = 16,824.37 : x
2. Step 2: Convert to fraction form
   30,971.83/42,739 = 16,824.37/x
3. Step 3: Cross multiply
   30,971.83x = 42,739 × 16,824.37
4. Step 4: Simplify right side
   30,971.83x = 719,056,749.43
5. Step 5: Solve for x
   x = 719,056,749.43/30,971.83
6. Step 6: Final answer
   x = 23,216.48