Finding the Fourth Proportional to 10,188.86, 14,049.25 and 9,780.62

Step by Step Solution

1. Step 1: Write the proportion equation
   10,188.86 : 14,049.25 = 9,780.62 : x
2. Step 2: Convert to fraction form
   10,188.86/14,049.25 = 9,780.62/x
3. Step 3: Cross multiply
   10,188.86x = 14,049.25 × 9,780.62
4. Step 4: Simplify right side
   10,188.86x = 137,410,280.84
5. Step 5: Solve for x
   x = 137,410,280.84/10,188.86
6. Step 6: Final answer
   x = 13,486.33