Finding the Fourth Proportional to 14,187.89, 19,578.90 and 7,900.27

Step by Step Solution

1. Step 1: Write the proportion equation
   14,187.89 : 19,578.90 = 7,900.27 : x
2. Step 2: Convert to fraction form
   14,187.89/19,578.90 = 7,900.27/x
3. Step 3: Cross multiply
   14,187.89x = 19,578.90 × 7,900.27
4. Step 4: Simplify right side
   14,187.89x = 154,678,596.30
5. Step 5: Solve for x
   x = 154,678,596.30/14,187.89
6. Step 6: Final answer
   x = 10,902.16