Finding the Fourth Proportional to 139,608.75, 209,371.27 and 59,643.49

Step by Step Solution

1. Step 1: Write the proportion equation
   139,608.75 : 209,371.27 = 59,643.49 : x
2. Step 2: Convert to fraction form
   139,608.75/209,371.27 = 59,643.49/x
3. Step 3: Cross multiply
   139,608.75x = 209,371.27 × 59,643.49
4. Step 4: Simplify right side
   139,608.75x = 12,487,633,248.53
5. Step 5: Solve for x
   x = 12,487,633,248.53/139,608.75
6. Step 6: Final answer
   x = 89,447.35