Finding the Fourth Proportional to 47,908.71, 71,857.56 and 12,845.61

Step by Step Solution

1. Step 1: Write the proportion equation
   47,908.71 : 71,857.56 = 12,845.61 : x
2. Step 2: Convert to fraction form
   47,908.71/71,857.56 = 12,845.61/x
3. Step 3: Cross multiply
   47,908.71x = 71,857.56 × 12,845.61
4. Step 4: Simplify right side
   47,908.71x = 923,054,191.31
5. Step 5: Solve for x
   x = 923,054,191.31/47,908.71
6. Step 6: Final answer
   x = 19,266.94