Finding the Fourth Proportional to 11,906.30, 16,422.12 and 7,868.44

Step by Step Solution

1. Step 1: Write the proportion equation
   11,906.30 : 16,422.12 = 7,868.44 : x
2. Step 2: Convert to fraction form
   11,906.30/16,422.12 = 7,868.44/x
3. Step 3: Cross multiply
   11,906.30x = 16,422.12 × 7,868.44
4. Step 4: Simplify right side
   11,906.30x = 129,216,465.89
5. Step 5: Solve for x
   x = 129,216,465.89/11,906.30
6. Step 6: Final answer
   x = 10,852.78