Finding the Fourth Proportional to 25,789.91, 38,680.71 and 7,065.57

Step by Step Solution

1. Step 1: Write the proportion equation
   25,789.91 : 38,680.71 = 7,065.57 : x
2. Step 2: Convert to fraction form
   25,789.91/38,680.71 = 7,065.57/x
3. Step 3: Cross multiply
   25,789.91x = 38,680.71 × 7,065.57
4. Step 4: Simplify right side
   25,789.91x = 273,301,264.15
5. Step 5: Solve for x
   x = 273,301,264.15/25,789.91
6. Step 6: Final answer
   x = 10,597.22