Finding the Fourth Proportional to 265,665.02, 398,413.67 and 105,671.39

Step by Step Solution

1. Step 1: Write the proportion equation
   265,665.02 : 398,413.67 = 105,671.39 : x
2. Step 2: Convert to fraction form
   265,665.02/398,413.67 = 105,671.39/x
3. Step 3: Cross multiply
   265,665.02x = 398,413.67 × 105,671.39
4. Step 4: Simplify right side
   265,665.02x = 42,100,923,783.48
5. Step 5: Solve for x
   x = 42,100,923,783.48/265,665.02
6. Step 6: Final answer
   x = 158,473.72