Finding the Fourth Proportional to 11,868.84, 16,379.10 and 7,152.12

Step by Step Solution

1. Step 1: Write the proportion equation
   11,868.84 : 16,379.10 = 7,152.12 : x
2. Step 2: Convert to fraction form
   11,868.84/16,379.10 = 7,152.12/x
3. Step 3: Cross multiply
   11,868.84x = 16,379.10 × 7,152.12
4. Step 4: Simplify right side
   11,868.84x = 117,145,288.69
5. Step 5: Solve for x
   x = 117,145,288.69/11,868.84
6. Step 6: Final answer
   x = 9,869.99