Finding the Fourth Proportional to 102,078.72, 140,829.30 and 75,284.73

Step by Step Solution

1. Step 1: Write the proportion equation
   102,078.72 : 140,829.30 = 75,284.73 : x
2. Step 2: Convert to fraction form
   102,078.72/140,829.30 = 75,284.73/x
3. Step 3: Cross multiply
   102,078.72x = 140,829.30 × 75,284.73
4. Step 4: Simplify right side
   102,078.72x = 10,602,295,826.59
5. Step 5: Solve for x
   x = 10,602,295,826.59/102,078.72
6. Step 6: Final answer
   x = 103,863.92