Finding the Fourth Proportional to 31,110.72, 42,932.16 and 16,964.16

Step by Step Solution

1. Step 1: Write the proportion equation
   31,110.72 : 42,932.16 = 16,964.16 : x
2. Step 2: Convert to fraction form
   31,110.72/42,932.16 = 16,964.16/x
3. Step 3: Cross multiply
   31,110.72x = 42,932.16 × 16,964.16
4. Step 4: Simplify right side
   31,110.72x = 728,308,031.39
5. Step 5: Solve for x
   x = 728,308,031.39/31,110.72
6. Step 6: Final answer
   x = 23,410.20