Finding the Fourth Proportional to 20,071.57, 27,673.59 and 12,888.82

Step by Step Solution

1. Step 1: Write the proportion equation
   20,071.57 : 27,673.59 = 12,888.82 : x
2. Step 2: Convert to fraction form
   20,071.57/27,673.59 = 12,888.82/x
3. Step 3: Cross multiply
   20,071.57x = 27,673.59 × 12,888.82
4. Step 4: Simplify right side
   20,071.57x = 356,679,920.26
5. Step 5: Solve for x
   x = 356,679,920.26/20,071.57
6. Step 6: Final answer
   x = 17,770.40