Finding the Fourth Proportional to 25,672.50, 35,428.05 and 13,896.50

Step by Step Solution

1. Step 1: Write the proportion equation
   25,672.50 : 35,428.05 = 13,896.50 : x
2. Step 2: Convert to fraction form
   25,672.50/35,428.05 = 13,896.50/x
3. Step 3: Cross multiply
   25,672.50x = 35,428.05 × 13,896.50
4. Step 4: Simplify right side
   25,672.50x = 492,325,896.83
5. Step 5: Solve for x
   x = 492,325,896.83/25,672.50
6. Step 6: Final answer
   x = 19,177.17