Finding the Fourth Proportional to 13,694.50, 18,898.38 and 7,406.88

Step by Step Solution

1. Step 1: Write the proportion equation
   13,694.50 : 18,898.38 = 7,406.88 : x
2. Step 2: Convert to fraction form
   13,694.50/18,898.38 = 7,406.88/x
3. Step 3: Cross multiply
   13,694.50x = 18,898.38 × 7,406.88
4. Step 4: Simplify right side
   13,694.50x = 139,978,032.85
5. Step 5: Solve for x
   x = 139,978,032.85/13,694.50
6. Step 6: Final answer
   x = 10,221.48