Finding the Fourth Proportional to 12,605.82, 18,905.37 and 7,658.34

Step by Step Solution

1. Step 1: Write the proportion equation
   12,605.82 : 18,905.37 = 7,658.34 : x
2. Step 2: Convert to fraction form
   12,605.82/18,905.37 = 7,658.34/x
3. Step 3: Cross multiply
   12,605.82x = 18,905.37 × 7,658.34
4. Step 4: Simplify right side
   12,605.82x = 144,783,751.29
5. Step 5: Solve for x
   x = 144,783,751.29/12,605.82
6. Step 6: Final answer
   x = 11,485.47