Finding the Fourth Proportional to 20,075.82, 27,705.34 and 12,116.49

Step by Step Solution

1. Step 1: Write the proportion equation
   20,075.82 : 27,705.34 = 12,116.49 : x
2. Step 2: Convert to fraction form
   20,075.82/27,705.34 = 12,116.49/x
3. Step 3: Cross multiply
   20,075.82x = 27,705.34 × 12,116.49
4. Step 4: Simplify right side
   20,075.82x = 335,691,386.31
5. Step 5: Solve for x
   x = 335,691,386.31/20,075.82
6. Step 6: Final answer
   x = 16,721.18