Finding the Fourth Proportional to 61,078.72, 91,616.78 and 16,705.47

Step by Step Solution

1. Step 1: Write the proportion equation
   61,078.72 : 91,616.78 = 16,705.47 : x
2. Step 2: Convert to fraction form
   61,078.72/91,616.78 = 16,705.47/x
3. Step 3: Cross multiply
   61,078.72x = 91,616.78 × 16,705.47
4. Step 4: Simplify right side
   61,078.72x = 1,530,501,057.22
5. Step 5: Solve for x
   x = 1,530,501,057.22/61,078.72
6. Step 6: Final answer
   x = 25,057.85