Finding the Fourth Proportional to 13,729.97, 18,946.58 and 7,761.89

Step by Step Solution

1. Step 1: Write the proportion equation
   13,729.97 : 18,946.58 = 7,761.89 : x
2. Step 2: Convert to fraction form
   13,729.97/18,946.58 = 7,761.89/x
3. Step 3: Cross multiply
   13,729.97x = 18,946.58 × 7,761.89
4. Step 4: Simplify right side
   13,729.97x = 147,061,278.39
5. Step 5: Solve for x
   x = 147,061,278.39/13,729.97
6. Step 6: Final answer
   x = 10,710.97