Finding the Fourth Proportional to 80,621.39, 111,287.71 and 60,536.30

Step by Step Solution

1. Step 1: Write the proportion equation
   80,621.39 : 111,287.71 = 60,536.30 : x
2. Step 2: Convert to fraction form
   80,621.39/111,287.71 = 60,536.30/x
3. Step 3: Cross multiply
   80,621.39x = 111,287.71 × 60,536.30
4. Step 4: Simplify right side
   80,621.39x = 6,736,945,718.10
5. Step 5: Solve for x
   x = 6,736,945,718.10/80,621.39
6. Step 6: Final answer
   x = 83,562.76