Finding the Fourth Proportional to 13,433.94, 18,538.74 and 7,768.62

Step by Step Solution

1. Step 1: Write the proportion equation
   13,433.94 : 18,538.74 = 7,768.62 : x
2. Step 2: Convert to fraction form
   13,433.94/18,538.74 = 7,768.62/x
3. Step 3: Cross multiply
   13,433.94x = 18,538.74 × 7,768.62
4. Step 4: Simplify right side
   13,433.94x = 144,020,426.34
5. Step 5: Solve for x
   x = 144,020,426.34/13,433.94
6. Step 6: Final answer
   x = 10,720.64