Finding the Fourth Proportional to 80,878.25, 111,613.20 and 46,889.30

Step by Step Solution

1. Step 1: Write the proportion equation
   80,878.25 : 111,613.20 = 46,889.30 : x
2. Step 2: Convert to fraction form
   80,878.25/111,613.20 = 46,889.30/x
3. Step 3: Cross multiply
   80,878.25x = 111,613.20 × 46,889.30
4. Step 4: Simplify right side
   80,878.25x = 5,233,464,818.76
5. Step 5: Solve for x
   x = 5,233,464,818.76/80,878.25
6. Step 6: Final answer
   x = 64,707.94