Finding the Fourth Proportional to 19,915.05, 27,472.71 and 12,365.85

Step by Step Solution

1. Step 1: Write the proportion equation
   19,915.05 : 27,472.71 = 12,365.85 : x
2. Step 2: Convert to fraction form
   19,915.05/27,472.71 = 12,365.85/x
3. Step 3: Cross multiply
   19,915.05x = 27,472.71 × 12,365.85
4. Step 4: Simplify right side
   19,915.05x = 339,723,410.95
5. Step 5: Solve for x
   x = 339,723,410.95/19,915.05
6. Step 6: Final answer
   x = 17,058.63