Finding the Fourth Proportional to 139,196.05, 192,087.88 and 78,765.59

Step by Step Solution

1. Step 1: Write the proportion equation
   139,196.05 : 192,087.88 = 78,765.59 : x
2. Step 2: Convert to fraction form
   139,196.05/192,087.88 = 78,765.59/x
3. Step 3: Cross multiply
   139,196.05x = 192,087.88 × 78,765.59
4. Step 4: Simplify right side
   139,196.05x = 15,129,915,200.05
5. Step 5: Solve for x
   x = 15,129,915,200.05/139,196.05
6. Step 6: Final answer
   x = 108,695.00