Finding the Fourth Proportional to 81,996.82, 122,946.62 and 28,663.18

Step by Step Solution

1. Step 1: Write the proportion equation
   81,996.82 : 122,946.62 = 28,663.18 : x
2. Step 2: Convert to fraction form
   81,996.82/122,946.62 = 28,663.18/x
3. Step 3: Cross multiply
   81,996.82x = 122,946.62 × 28,663.18
4. Step 4: Simplify right side
   81,996.82x = 3,524,041,099.45
5. Step 5: Solve for x
   x = 3,524,041,099.45/81,996.82
6. Step 6: Final answer
   x = 42,977.78