Finding the Fourth Proportional to 25,978.62, 38,972.82 and 8,453.46

Step by Step Solution

1. Step 1: Write the proportion equation
   25,978.62 : 38,972.82 = 8,453.46 : x
2. Step 2: Convert to fraction form
   25,978.62/38,972.82 = 8,453.46/x
3. Step 3: Cross multiply
   25,978.62x = 38,972.82 × 8,453.46
4. Step 4: Simplify right side
   25,978.62x = 329,455,174.96
5. Step 5: Solve for x
   x = 329,455,174.96/25,978.62
6. Step 6: Final answer
   x = 12,681.78