Finding the Fourth Proportional to 12,385.62, 17,097.21 and 9,236.34

Step by Step Solution

1. Step 1: Write the proportion equation
   12,385.62 : 17,097.21 = 9,236.34 : x
2. Step 2: Convert to fraction form
   12,385.62/17,097.21 = 9,236.34/x
3. Step 3: Cross multiply
   12,385.62x = 17,097.21 × 9,236.34
4. Step 4: Simplify right side
   12,385.62x = 157,915,644.61
5. Step 5: Solve for x
   x = 157,915,644.61/12,385.62
6. Step 6: Final answer
   x = 12,749.92