Finding the Fourth Proportional to 105,762.56, 158,678.40 and 82,469.12

Step by Step Solution

1. Step 1: Write the proportion equation
   105,762.56 : 158,678.40 = 82,469.12 : x
2. Step 2: Convert to fraction form
   105,762.56/158,678.40 = 82,469.12/x
3. Step 3: Cross multiply
   105,762.56x = 158,678.40 × 82,469.12
4. Step 4: Simplify right side
   105,762.56x = 13,086,068,011.01
5. Step 5: Solve for x
   x = 13,086,068,011.01/105,762.56
6. Step 6: Final answer
   x = 123,730.63