Finding the Fourth Proportional to 14,485.38, 19,989.82 and 7,861.38

Step by Step Solution

1. Step 1: Write the proportion equation
   14,485.38 : 19,989.82 = 7,861.38 : x
2. Step 2: Convert to fraction form
   14,485.38/19,989.82 = 7,861.38/x
3. Step 3: Cross multiply
   14,485.38x = 19,989.82 × 7,861.38
4. Step 4: Simplify right side
   14,485.38x = 157,147,571.15
5. Step 5: Solve for x
   x = 157,147,571.15/14,485.38
6. Step 6: Final answer
   x = 10,848.70