Finding the Fourth Proportional to 12,109.59, 16,705.31 and 7,385.67

Step by Step Solution

1. Step 1: Write the proportion equation
   12,109.59 : 16,705.31 = 7,385.67 : x
2. Step 2: Convert to fraction form
   12,109.59/16,705.31 = 7,385.67/x
3. Step 3: Cross multiply
   12,109.59x = 16,705.31 × 7,385.67
4. Step 4: Simplify right side
   12,109.59x = 123,379,869.98
5. Step 5: Solve for x
   x = 123,379,869.98/12,109.59
6. Step 6: Final answer
   x = 10,188.61