Finding the Fourth Proportional to 17,120.99, 23,620.46 and 12,655.46

Step by Step Solution

1. Step 1: Write the proportion equation
   17,120.99 : 23,620.46 = 12,655.46 : x
2. Step 2: Convert to fraction form
   17,120.99/23,620.46 = 12,655.46/x
3. Step 3: Cross multiply
   17,120.99x = 23,620.46 × 12,655.46
4. Step 4: Simplify right side
   17,120.99x = 298,927,605.33
5. Step 5: Solve for x
   x = 298,927,605.33/17,120.99
6. Step 6: Final answer
   x = 17,459.72