Finding the Fourth Proportional to 13,648.96, 18,835.51 and 7,680.73

Step by Step Solution

1. Step 1: Write the proportion equation
   13,648.96 : 18,835.51 = 7,680.73 : x
2. Step 2: Convert to fraction form
   13,648.96/18,835.51 = 7,680.73/x
3. Step 3: Cross multiply
   13,648.96x = 18,835.51 × 7,680.73
4. Step 4: Simplify right side
   13,648.96x = 144,670,428.55
5. Step 5: Solve for x
   x = 144,670,428.55/13,648.96
6. Step 6: Final answer
   x = 10,599.37