Finding the Fourth Proportional to 13,419.18, 18,518.22 and 7,450.56

Step by Step Solution

1. Step 1: Write the proportion equation
   13,419.18 : 18,518.22 = 7,450.56 : x
2. Step 2: Convert to fraction form
   13,419.18/18,518.22 = 7,450.56/x
3. Step 3: Cross multiply
   13,419.18x = 18,518.22 × 7,450.56
4. Step 4: Simplify right side
   13,419.18x = 137,971,109.20
5. Step 5: Solve for x
   x = 137,971,109.20/13,419.18
6. Step 6: Final answer
   x = 10,281.63