Finding the Fourth Proportional to 80,878.75, 111,613.89 and 46,889.80

Step by Step Solution

1. Step 1: Write the proportion equation
   80,878.75 : 111,613.89 = 46,889.80 : x
2. Step 2: Convert to fraction form
   80,878.75/111,613.89 = 46,889.80/x
3. Step 3: Cross multiply
   80,878.75x = 111,613.89 × 46,889.80
4. Step 4: Simplify right side
   80,878.75x = 5,233,552,979.32
5. Step 5: Solve for x
   x = 5,233,552,979.32/80,878.75
6. Step 6: Final answer
   x = 64,708.63