Finding the Fourth Proportional to 12,486.09, 17,212.92 and 7,702.83

Step by Step Solution

1. Step 1: Write the proportion equation
   12,486.09 : 17,212.92 = 7,702.83 : x
2. Step 2: Convert to fraction form
   12,486.09/17,212.92 = 7,702.83/x
3. Step 3: Cross multiply
   12,486.09x = 17,212.92 × 7,702.83
4. Step 4: Simplify right side
   12,486.09x = 132,588,196.56
5. Step 5: Solve for x
   x = 132,588,196.56/12,486.09
6. Step 6: Final answer
   x = 10,618.87