Finding the Fourth Proportional to 80,010.78, 110,407.41 and 51,279.72

Step by Step Solution

1. Step 1: Write the proportion equation
   80,010.78 : 110,407.41 = 51,279.72 : x
2. Step 2: Convert to fraction form
   80,010.78/110,407.41 = 51,279.72/x
3. Step 3: Cross multiply
   80,010.78x = 110,407.41 × 51,279.72
4. Step 4: Simplify right side
   80,010.78x = 5,661,661,070.73
5. Step 5: Solve for x
   x = 5,661,661,070.73/80,010.78
6. Step 6: Final answer
   x = 70,761.23