Finding the Fourth Proportional to 30,441.91, 42,036.56 and 19,131

Step by Step Solution

1. Step 1: Write the proportion equation
   30,441.91 : 42,036.56 = 19,131 : x
2. Step 2: Convert to fraction form
   30,441.91/42,036.56 = 19,131/x
3. Step 3: Cross multiply
   30,441.91x = 42,036.56 × 19,131
4. Step 4: Simplify right side
   30,441.91x = 804,201,429.36
5. Step 5: Solve for x
   x = 804,201,429.36/30,441.91
6. Step 6: Final answer
   x = 26,417.57