Finding the Fourth Proportional to 23,212.16, 34,807.59 and 12,685.72

Step by Step Solution

1. Step 1: Write the proportion equation
   23,212.16 : 34,807.59 = 12,685.72 : x
2. Step 2: Convert to fraction form
   23,212.16/34,807.59 = 12,685.72/x
3. Step 3: Cross multiply
   23,212.16x = 34,807.59 × 12,685.72
4. Step 4: Simplify right side
   23,212.16x = 441,559,340.61
5. Step 5: Solve for x
   x = 441,559,340.61/23,212.16
6. Step 6: Final answer
   x = 19,022.76