Finding the Fourth Proportional to 81,995.82, 122,945.12 and 28,662.18

Step by Step Solution

1. Step 1: Write the proportion equation
   81,995.82 : 122,945.12 = 28,662.18 : x
2. Step 2: Convert to fraction form
   81,995.82/122,945.12 = 28,662.18/x
3. Step 3: Cross multiply
   81,995.82x = 122,945.12 × 28,662.18
4. Step 4: Simplify right side
   81,995.82x = 3,523,875,159.56
5. Step 5: Solve for x
   x = 3,523,875,159.56/81,995.82
6. Step 6: Final answer
   x = 42,976.28