Finding the Fourth Proportional to 139,873.60, 209,647.68 and 79,944.04

Step by Step Solution

1. Step 1: Write the proportion equation
   139,873.60 : 209,647.68 = 79,944.04 : x
2. Step 2: Convert to fraction form
   139,873.60/209,647.68 = 79,944.04/x
3. Step 3: Cross multiply
   139,873.60x = 209,647.68 × 79,944.04
4. Step 4: Simplify right side
   139,873.60x = 16,760,082,515.83
5. Step 5: Solve for x
   x = 16,760,082,515.83/139,873.60
6. Step 6: Final answer
   x = 119,823.06