Finding the Fourth Proportional to 105,522.48, 158,225.40 and 80,231.12

Step by Step Solution

1. Step 1: Write the proportion equation
   105,522.48 : 158,225.40 = 80,231.12 : x
2. Step 2: Convert to fraction form
   105,522.48/158,225.40 = 80,231.12/x
3. Step 3: Cross multiply
   105,522.48x = 158,225.40 × 80,231.12
4. Step 4: Simplify right side
   105,522.48x = 12,694,601,054.45
5. Step 5: Solve for x
   x = 12,694,601,054.45/105,522.48
6. Step 6: Final answer
   x = 120,302.34