Finding the Fourth Proportional to 31,131.40, 42,949.04 and 19,174

Step by Step Solution

1. Step 1: Write the proportion equation
   31,131.40 : 42,949.04 = 19,174 : x
2. Step 2: Convert to fraction form
   31,131.40/42,949.04 = 19,174/x
3. Step 3: Cross multiply
   31,131.40x = 42,949.04 × 19,174
4. Step 4: Simplify right side
   31,131.40x = 823,504,892.96
5. Step 5: Solve for x
   x = 823,504,892.96/31,131.40
6. Step 6: Final answer
   x = 26,452.55