Finding the Fourth Proportional to 31,111.68, 42,933.56 and 16,964.22

Step by Step Solution

1. Step 1: Write the proportion equation
   31,111.68 : 42,933.56 = 16,964.22 : x
2. Step 2: Convert to fraction form
   31,111.68/42,933.56 = 16,964.22/x
3. Step 3: Cross multiply
   31,111.68x = 42,933.56 × 16,964.22
4. Step 4: Simplify right side
   31,111.68x = 728,334,357.22
5. Step 5: Solve for x
   x = 728,334,357.22/31,111.68
6. Step 6: Final answer
   x = 23,410.32