Finding the Fourth Proportional to 139,611.52, 209,144.40 and 111,590.56

Step by Step Solution

1. Step 1: Write the proportion equation
   139,611.52 : 209,144.40 = 111,590.56 : x
2. Step 2: Convert to fraction form
   139,611.52/209,144.40 = 111,590.56/x
3. Step 3: Cross multiply
   139,611.52x = 209,144.40 × 111,590.56
4. Step 4: Simplify right side
   139,611.52x = 23,338,540,716.86
5. Step 5: Solve for x
   x = 23,338,540,716.86/139,611.52
6. Step 6: Final answer
   x = 167,167.73