Finding the Fourth Proportional to 13,150.62, 18,145.45 and 7,485.04

Step by Step Solution

1. Step 1: Write the proportion equation
   13,150.62 : 18,145.45 = 7,485.04 : x
2. Step 2: Convert to fraction form
   13,150.62/18,145.45 = 7,485.04/x
3. Step 3: Cross multiply
   13,150.62x = 18,145.45 × 7,485.04
4. Step 4: Simplify right side
   13,150.62x = 135,819,419.07
5. Step 5: Solve for x
   x = 135,819,419.07/13,150.62
6. Step 6: Final answer
   x = 10,327.99