Finding the Fourth Proportional to 11,902.65, 16,414.32 and 7,121.82

Step by Step Solution

1. Step 1: Write the proportion equation
   11,902.65 : 16,414.32 = 7,121.82 : x
2. Step 2: Convert to fraction form
   11,902.65/16,414.32 = 7,121.82/x
3. Step 3: Cross multiply
   11,902.65x = 16,414.32 × 7,121.82
4. Step 4: Simplify right side
   11,902.65x = 116,899,832.46
5. Step 5: Solve for x
   x = 116,899,832.46/11,902.65
6. Step 6: Final answer
   x = 9,821.33