Finding the Fourth Proportional to 139,180.32, 208,584.36 and 72,480.42

Step by Step Solution

1. Step 1: Write the proportion equation
   139,180.32 : 208,584.36 = 72,480.42 : x
2. Step 2: Convert to fraction form
   139,180.32/208,584.36 = 72,480.42/x
3. Step 3: Cross multiply
   139,180.32x = 208,584.36 × 72,480.42
4. Step 4: Simplify right side
   139,180.32x = 15,118,282,018.23
5. Step 5: Solve for x
   x = 15,118,282,018.23/139,180.32
6. Step 6: Final answer
   x = 108,623.70