Finding the Fourth Proportional to 31,173.30, 42,974.69 and 19,228.64

Step by Step Solution

1. Step 1: Write the proportion equation
   31,173.30 : 42,974.69 = 19,228.64 : x
2. Step 2: Convert to fraction form
   31,173.30/42,974.69 = 19,228.64/x
3. Step 3: Cross multiply
   31,173.30x = 42,974.69 × 19,228.64
4. Step 4: Simplify right side
   31,173.30x = 826,344,532.10
5. Step 5: Solve for x
   x = 826,344,532.10/31,173.30
6. Step 6: Final answer
   x = 26,508.09