Finding the Fourth Proportional to 16,816.94, 23,209.01 and 12,560.61

Step by Step Solution

1. Step 1: Write the proportion equation
   16,816.94 : 23,209.01 = 12,560.61 : x
2. Step 2: Convert to fraction form
   16,816.94/23,209.01 = 12,560.61/x
3. Step 3: Cross multiply
   16,816.94x = 23,209.01 × 12,560.61
4. Step 4: Simplify right side
   16,816.94x = 291,519,323.10
5. Step 5: Solve for x
   x = 291,519,323.10/16,816.94
6. Step 6: Final answer
   x = 17,334.86