Finding the Fourth Proportional to 12,397.39, 17,085.32 and 8,418.67

Step by Step Solution

1. Step 1: Write the proportion equation
   12,397.39 : 17,085.32 = 8,418.67 : x
2. Step 2: Convert to fraction form
   12,397.39/17,085.32 = 8,418.67/x
3. Step 3: Cross multiply
   12,397.39x = 17,085.32 × 8,418.67
4. Step 4: Simplify right side
   12,397.39x = 143,835,543.40
5. Step 5: Solve for x
   x = 143,835,543.40/12,397.39
6. Step 6: Final answer
   x = 11,602.09