Finding the Fourth Proportional to 20,736.78, 31,118.49 and 9,051.18

Step by Step Solution

1. Step 1: Write the proportion equation
   20,736.78 : 31,118.49 = 9,051.18 : x
2. Step 2: Convert to fraction form
   20,736.78/31,118.49 = 9,051.18/x
3. Step 3: Cross multiply
   20,736.78x = 31,118.49 × 9,051.18
4. Step 4: Simplify right side
   20,736.78x = 281,659,054.32
5. Step 5: Solve for x
   x = 281,659,054.32/20,736.78
6. Step 6: Final answer
   x = 13,582.58