Finding the Fourth Proportional to 12,418.48, 17,138.32 and 7,705.92

Step by Step Solution

1. Step 1: Write the proportion equation
   12,418.48 : 17,138.32 = 7,705.92 : x
2. Step 2: Convert to fraction form
   12,418.48/17,138.32 = 7,705.92/x
3. Step 3: Cross multiply
   12,418.48x = 17,138.32 × 7,705.92
4. Step 4: Simplify right side
   12,418.48x = 132,066,522.85
5. Step 5: Solve for x
   x = 132,066,522.85/12,418.48
6. Step 6: Final answer
   x = 10,634.68