Finding the Fourth Proportional to 105,980.73, 158,823.46 and 79,654.78

Step by Step Solution

1. Step 1: Write the proportion equation
   105,980.73 : 158,823.46 = 79,654.78 : x
2. Step 2: Convert to fraction form
   105,980.73/158,823.46 = 79,654.78/x
3. Step 3: Cross multiply
   105,980.73x = 158,823.46 × 79,654.78
4. Step 4: Simplify right side
   105,980.73x = 12,651,047,765.14
5. Step 5: Solve for x
   x = 12,651,047,765.14/105,980.73
6. Step 6: Final answer
   x = 119,371.21