Finding the Fourth Proportional to 25,020.91, 34,489.15 and 19,707.31

Step by Step Solution

1. Step 1: Write the proportion equation
   25,020.91 : 34,489.15 = 19,707.31 : x
2. Step 2: Convert to fraction form
   25,020.91/34,489.15 = 19,707.31/x
3. Step 3: Cross multiply
   25,020.91x = 34,489.15 × 19,707.31
4. Step 4: Simplify right side
   25,020.91x = 679,688,370.69
5. Step 5: Solve for x
   x = 679,688,370.69/25,020.91
6. Step 6: Final answer
   x = 27,164.81