Finding the Fourth Proportional to 13,429.89, 20,108.79 and 8,735.94

Step by Step Solution

1. Step 1: Write the proportion equation
   13,429.89 : 20,108.79 = 8,735.94 : x
2. Step 2: Convert to fraction form
   13,429.89/20,108.79 = 8,735.94/x
3. Step 3: Cross multiply
   13,429.89x = 20,108.79 × 8,735.94
4. Step 4: Simplify right side
   13,429.89x = 175,669,182.91
5. Step 5: Solve for x
   x = 175,669,182.91/13,429.89
6. Step 6: Final answer
   x = 13,080.46