Finding the Fourth Proportional to 80,845.10, 111,536.06 and 80,720.49

Step by Step Solution

1. Step 1: Write the proportion equation
   80,845.10 : 111,536.06 = 80,720.49 : x
2. Step 2: Convert to fraction form
   80,845.10/111,536.06 = 80,720.49/x
3. Step 3: Cross multiply
   80,845.10x = 111,536.06 × 80,720.49
4. Step 4: Simplify right side
   80,845.10x = 9,003,245,012.27
5. Step 5: Solve for x
   x = 9,003,245,012.27/80,845.10
6. Step 6: Final answer
   x = 111,364.15