Finding the Fourth Proportional to 13,499.20, 18,628.85 and 7,530.86

Step by Step Solution

1. Step 1: Write the proportion equation
   13,499.20 : 18,628.85 = 7,530.86 : x
2. Step 2: Convert to fraction form
   13,499.20/18,628.85 = 7,530.86/x
3. Step 3: Cross multiply
   13,499.20x = 18,628.85 × 7,530.86
4. Step 4: Simplify right side
   13,499.20x = 140,291,270.23
5. Step 5: Solve for x
   x = 140,291,270.23/13,499.20
6. Step 6: Final answer
   x = 10,392.56