Finding the Fourth Proportional to 12,109.34, 16,704.96 and 7,385.42

Step by Step Solution

1. Step 1: Write the proportion equation
   12,109.34 : 16,704.96 = 7,385.42 : x
2. Step 2: Convert to fraction form
   12,109.34/16,704.96 = 7,385.42/x
3. Step 3: Cross multiply
   12,109.34x = 16,704.96 × 7,385.42
4. Step 4: Simplify right side
   12,109.34x = 123,373,145.68
5. Step 5: Solve for x
   x = 123,373,145.68/12,109.34
6. Step 6: Final answer
   x = 10,188.26