Finding the Fourth Proportional to 47,870.97, 71,806.41 and 12,809.72

Step by Step Solution

1. Step 1: Write the proportion equation
   47,870.97 : 71,806.41 = 12,809.72 : x
2. Step 2: Convert to fraction form
   47,870.97/71,806.41 = 12,809.72/x
3. Step 3: Cross multiply
   47,870.97x = 71,806.41 × 12,809.72
4. Step 4: Simplify right side
   47,870.97x = 919,819,647.27
5. Step 5: Solve for x
   x = 919,819,647.27/47,870.97
6. Step 6: Final answer
   x = 19,214.56