Finding the Fourth Proportional to 139,890.24, 192,922.56 and 89,579.52

Step by Step Solution

1. Step 1: Write the proportion equation
   139,890.24 : 192,922.56 = 89,579.52 : x
2. Step 2: Convert to fraction form
   139,890.24/192,922.56 = 89,579.52/x
3. Step 3: Cross multiply
   139,890.24x = 192,922.56 × 89,579.52
4. Step 4: Simplify right side
   139,890.24x = 17,281,910,321.97
5. Step 5: Solve for x
   x = 17,281,910,321.97/139,890.24
6. Step 6: Final answer
   x = 123,539.07