Finding the Fourth Proportional to 80,678.89, 121,034.73 and 28,092.47

Step by Step Solution

1. Step 1: Write the proportion equation
   80,678.89 : 121,034.73 = 28,092.47 : x
2. Step 2: Convert to fraction form
   80,678.89/121,034.73 = 28,092.47/x
3. Step 3: Cross multiply
   80,678.89x = 121,034.73 × 28,092.47
4. Step 4: Simplify right side
   80,678.89x = 3,400,164,623.47
5. Step 5: Solve for x
   x = 3,400,164,623.47/80,678.89
6. Step 6: Final answer
   x = 42,144.42