Finding the Fourth Proportional to 12,499.18, 18,739.51 and 7,567.65

Step by Step Solution

1. Step 1: Write the proportion equation
   12,499.18 : 18,739.51 = 7,567.65 : x
2. Step 2: Convert to fraction form
   12,499.18/18,739.51 = 7,567.65/x
3. Step 3: Cross multiply
   12,499.18x = 18,739.51 × 7,567.65
4. Step 4: Simplify right side
   12,499.18x = 141,814,052.85
5. Step 5: Solve for x
   x = 141,814,052.85/12,499.18
6. Step 6: Final answer
   x = 11,345.87