Finding the Fourth Proportional to 13,419.30, 18,517.69 and 7,450.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,419.30 : 18,517.69 = 7,450.50 : x
2. Step 2: Convert to fraction form
   13,419.30/18,517.69 = 7,450.50/x
3. Step 3: Cross multiply
   13,419.30x = 18,517.69 × 7,450.50
4. Step 4: Simplify right side
   13,419.30x = 137,966,049.35
5. Step 5: Solve for x
   x = 137,966,049.35/13,419.30
6. Step 6: Final answer
   x = 10,281.17