Finding the Fourth Proportional to 20,615.16, 30,878.82 and 10,068.96

Step by Step Solution

1. Step 1: Write the proportion equation
   20,615.16 : 30,878.82 = 10,068.96 : x
2. Step 2: Convert to fraction form
   20,615.16/30,878.82 = 10,068.96/x
3. Step 3: Cross multiply
   20,615.16x = 30,878.82 × 10,068.96
4. Step 4: Simplify right side
   20,615.16x = 310,917,603.43
5. Step 5: Solve for x
   x = 310,917,603.43/20,615.16
6. Step 6: Final answer
   x = 15,081.99