Finding the Fourth Proportional to 25,691.24, 35,454.15 and 15,081.05

Step by Step Solution

1. Step 1: Write the proportion equation
   25,691.24 : 35,454.15 = 15,081.05 : x
2. Step 2: Convert to fraction form
   25,691.24/35,454.15 = 15,081.05/x
3. Step 3: Cross multiply
   25,691.24x = 35,454.15 × 15,081.05
4. Step 4: Simplify right side
   25,691.24x = 534,685,631.59
5. Step 5: Solve for x
   x = 534,685,631.59/25,691.24
6. Step 6: Final answer
   x = 20,811.99