Finding the Fourth Proportional to 31,127.74, 42,956.10 and 16,980.58

Step by Step Solution

1. Step 1: Write the proportion equation
   31,127.74 : 42,956.10 = 16,980.58 : x
2. Step 2: Convert to fraction form
   31,127.74/42,956.10 = 16,980.58/x
3. Step 3: Cross multiply
   31,127.74x = 42,956.10 × 16,980.58
4. Step 4: Simplify right side
   31,127.74x = 729,419,492.54
5. Step 5: Solve for x
   x = 729,419,492.54/31,127.74
6. Step 6: Final answer
   x = 23,433.10