Finding the Fourth Proportional to 31,127.45, 42,956.18 and 16,980.59

Step by Step Solution

1. Step 1: Write the proportion equation
   31,127.45 : 42,956.18 = 16,980.59 : x
2. Step 2: Convert to fraction form
   31,127.45/42,956.18 = 16,980.59/x
3. Step 3: Cross multiply
   31,127.45x = 42,956.18 × 16,980.59
4. Step 4: Simplify right side
   31,127.45x = 729,420,980.86
5. Step 5: Solve for x
   x = 729,420,980.86/31,127.45
6. Step 6: Final answer
   x = 23,433.37