Finding the Fourth Proportional to 12,499.52, 17,235.59 and 8,021.57

Step by Step Solution

1. Step 1: Write the proportion equation
   12,499.52 : 17,235.59 = 8,021.57 : x
2. Step 2: Convert to fraction form
   12,499.52/17,235.59 = 8,021.57/x
3. Step 3: Cross multiply
   12,499.52x = 17,235.59 × 8,021.57
4. Step 4: Simplify right side
   12,499.52x = 138,256,365.39
5. Step 5: Solve for x
   x = 138,256,365.39/12,499.52
6. Step 6: Final answer
   x = 11,060.94