Finding the Fourth Proportional to 11,870, 16,369.76 and 10,190.87

Step by Step Solution

1. Step 1: Write the proportion equation
   11,870 : 16,369.76 = 10,190.87 : x
2. Step 2: Convert to fraction form
   11,870/16,369.76 = 10,190.87/x
3. Step 3: Cross multiply
   11,870x = 16,369.76 × 10,190.87
4. Step 4: Simplify right side
   11,870x = 166,822,096.09
5. Step 5: Solve for x
   x = 166,822,096.09/11,870
6. Step 6: Final answer
   x = 14,054.09