Finding the Fourth Proportional to 31,127.73, 42,956.17 and 16,980.47

Step by Step Solution

1. Step 1: Write the proportion equation
   31,127.73 : 42,956.17 = 16,980.47 : x
2. Step 2: Convert to fraction form
   31,127.73/42,956.17 = 16,980.47/x
3. Step 3: Cross multiply
   31,127.73x = 42,956.17 × 16,980.47
4. Step 4: Simplify right side
   31,127.73x = 729,415,955.37
5. Step 5: Solve for x
   x = 729,415,955.37/31,127.73
6. Step 6: Final answer
   x = 23,433.00