Finding the Fourth Proportional to 31,131.36, 42,961.52 and 16,984.32

Step by Step Solution

1. Step 1: Write the proportion equation
   31,131.36 : 42,961.52 = 16,984.32 : x
2. Step 2: Convert to fraction form
   31,131.36/42,961.52 = 16,984.32/x
3. Step 3: Cross multiply
   31,131.36x = 42,961.52 × 16,984.32
4. Step 4: Simplify right side
   31,131.36x = 729,672,203.37
5. Step 5: Solve for x
   x = 729,672,203.37/31,131.36
6. Step 6: Final answer
   x = 23,438.49