Finding the Fourth Proportional to 12,683.20, 17,502.72 and 7,381.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,683.20 : 17,502.72 = 7,381.12 : x
2. Step 2: Convert to fraction form
   12,683.20/17,502.72 = 7,381.12/x
3. Step 3: Cross multiply
   12,683.20x = 17,502.72 × 7,381.12
4. Step 4: Simplify right side
   12,683.20x = 129,189,676.65
5. Step 5: Solve for x
   x = 129,189,676.65/12,683.20
6. Step 6: Final answer
   x = 10,185.89