Finding the Fourth Proportional to 13,434.48, 18,538.17 and 7,768.35

Step by Step Solution

1. Step 1: Write the proportion equation
   13,434.48 : 18,538.17 = 7,768.35 : x
2. Step 2: Convert to fraction form
   13,434.48/18,538.17 = 7,768.35/x
3. Step 3: Cross multiply
   13,434.48x = 18,538.17 × 7,768.35
4. Step 4: Simplify right side
   13,434.48x = 144,010,992.92
5. Step 5: Solve for x
   x = 144,010,992.92/13,434.48
6. Step 6: Final answer
   x = 10,719.51