Finding the Fourth Proportional to 31,096.64, 42,914.40 and 18,519.68

Step by Step Solution

1. Step 1: Write the proportion equation
   31,096.64 : 42,914.40 = 18,519.68 : x
2. Step 2: Convert to fraction form
   31,096.64/42,914.40 = 18,519.68/x
3. Step 3: Cross multiply
   31,096.64x = 42,914.40 × 18,519.68
4. Step 4: Simplify right side
   31,096.64x = 794,760,955.39
5. Step 5: Solve for x
   x = 794,760,955.39/31,096.64
6. Step 6: Final answer
   x = 25,557.78