Finding the Fourth Proportional to 13,422.22, 18,521.31 and 7,836.46

Step by Step Solution

1. Step 1: Write the proportion equation
   13,422.22 : 18,521.31 = 7,836.46 : x
2. Step 2: Convert to fraction form
   13,422.22/18,521.31 = 7,836.46/x
3. Step 3: Cross multiply
   13,422.22x = 18,521.31 × 7,836.46
4. Step 4: Simplify right side
   13,422.22x = 145,141,504.96
5. Step 5: Solve for x
   x = 145,141,504.96/13,422.22
6. Step 6: Final answer
   x = 10,813.52