Finding the Fourth Proportional to 13,705, 18,911.88 and 7,737.28

Step by Step Solution

1. Step 1: Write the proportion equation
   13,705 : 18,911.88 = 7,737.28 : x
2. Step 2: Convert to fraction form
   13,705/18,911.88 = 7,737.28/x
3. Step 3: Cross multiply
   13,705x = 18,911.88 × 7,737.28
4. Step 4: Simplify right side
   13,705x = 146,326,510.89
5. Step 5: Solve for x
   x = 146,326,510.89/13,705
6. Step 6: Final answer
   x = 10,676.87