Finding the Fourth Proportional to 139,415.82, 209,006.17 and 60,470.59

Step by Step Solution

1. Step 1: Write the proportion equation
   139,415.82 : 209,006.17 = 60,470.59 : x
2. Step 2: Convert to fraction form
   139,415.82/209,006.17 = 60,470.59/x
3. Step 3: Cross multiply
   139,415.82x = 209,006.17 × 60,470.59
4. Step 4: Simplify right side
   139,415.82x = 12,638,726,413.54
5. Step 5: Solve for x
   x = 12,638,726,413.54/139,415.82
6. Step 6: Final answer
   x = 90,654.89