Finding the Fourth Proportional to 103,769.73, 155,654.64 and 80,111.83

Step by Step Solution

1. Step 1: Write the proportion equation
   103,769.73 : 155,654.64 = 80,111.83 : x
2. Step 2: Convert to fraction form
   103,769.73/155,654.64 = 80,111.83/x
3. Step 3: Cross multiply
   103,769.73x = 155,654.64 × 80,111.83
4. Step 4: Simplify right side
   103,769.73x = 12,469,777,669.25
5. Step 5: Solve for x
   x = 12,469,777,669.25/103,769.73
6. Step 6: Final answer
   x = 120,167.78