Finding the Fourth Proportional to 12,118.50, 16,723.80 and 7,405.38

Step by Step Solution

1. Step 1: Write the proportion equation
   12,118.50 : 16,723.80 = 7,405.38 : x
2. Step 2: Convert to fraction form
   12,118.50/16,723.80 = 7,405.38/x
3. Step 3: Cross multiply
   12,118.50x = 16,723.80 × 7,405.38
4. Step 4: Simplify right side
   12,118.50x = 123,846,094.04
5. Step 5: Solve for x
   x = 123,846,094.04/12,118.50
6. Step 6: Final answer
   x = 10,219.59