Finding the Fourth Proportional to 72,688.65, 109,047.62 and 25,940.31

Step by Step Solution

1. Step 1: Write the proportion equation
   72,688.65 : 109,047.62 = 25,940.31 : x
2. Step 2: Convert to fraction form
   72,688.65/109,047.62 = 25,940.31/x
3. Step 3: Cross multiply
   72,688.65x = 109,047.62 × 25,940.31
4. Step 4: Simplify right side
   72,688.65x = 2,828,729,067.56
5. Step 5: Solve for x
   x = 2,828,729,067.56/72,688.65
6. Step 6: Final answer
   x = 38,915.69