Finding the Fourth Proportional to 12,684.27, 17,499.99 and 7,374.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,684.27 : 17,499.99 = 7,374.72 : x
2. Step 2: Convert to fraction form
   12,684.27/17,499.99 = 7,374.72/x
3. Step 3: Cross multiply
   12,684.27x = 17,499.99 × 7,374.72
4. Step 4: Simplify right side
   12,684.27x = 129,057,526.25
5. Step 5: Solve for x
   x = 129,057,526.25/12,684.27
6. Step 6: Final answer
   x = 10,174.61