Finding the Fourth Proportional to 143,185.73, 197,598.75 and 78,657.69

Step by Step Solution

1. Step 1: Write the proportion equation
   143,185.73 : 197,598.75 = 78,657.69 : x
2. Step 2: Convert to fraction form
   143,185.73/197,598.75 = 78,657.69/x
3. Step 3: Cross multiply
   143,185.73x = 197,598.75 × 78,657.69
4. Step 4: Simplify right side
   143,185.73x = 15,542,661,221.89
5. Step 5: Solve for x
   x = 15,542,661,221.89/143,185.73
6. Step 6: Final answer
   x = 108,548.95