Finding the Fourth Proportional to 25,667.19, 35,420.94 and 15,057

Step by Step Solution

1. Step 1: Write the proportion equation
   25,667.19 : 35,420.94 = 15,057 : x
2. Step 2: Convert to fraction form
   25,667.19/35,420.94 = 15,057/x
3. Step 3: Cross multiply
   25,667.19x = 35,420.94 × 15,057
4. Step 4: Simplify right side
   25,667.19x = 533,333,093.58
5. Step 5: Solve for x
   x = 533,333,093.58/25,667.19
6. Step 6: Final answer
   x = 20,778.79