Finding the Fourth Proportional to 139,196.30, 192,088.22 and 78,765.84

Step by Step Solution

1. Step 1: Write the proportion equation
   139,196.30 : 192,088.22 = 78,765.84 : x
2. Step 2: Convert to fraction form
   139,196.30/192,088.22 = 78,765.84/x
3. Step 3: Cross multiply
   139,196.30x = 192,088.22 × 78,765.84
4. Step 4: Simplify right side
   139,196.30x = 15,129,989,608.58
5. Step 5: Solve for x
   x = 15,129,989,608.58/139,196.30
6. Step 6: Final answer
   x = 108,695.35