Finding the Fourth Proportional to 13,499.12, 18,628.88 and 7,530.96

Step by Step Solution

1. Step 1: Write the proportion equation
   13,499.12 : 18,628.88 = 7,530.96 : x
2. Step 2: Convert to fraction form
   13,499.12/18,628.88 = 7,530.96/x
3. Step 3: Cross multiply
   13,499.12x = 18,628.88 × 7,530.96
4. Step 4: Simplify right side
   13,499.12x = 140,293,350.12
5. Step 5: Solve for x
   x = 140,293,350.12/13,499.12
6. Step 6: Final answer
   x = 10,392.78