Finding the Fourth Proportional to 139,441.33, 192,405.27 and 78,999.49

Step by Step Solution

1. Step 1: Write the proportion equation
   139,441.33 : 192,405.27 = 78,999.49 : x
2. Step 2: Convert to fraction form
   139,441.33/192,405.27 = 78,999.49/x
3. Step 3: Cross multiply
   139,441.33x = 192,405.27 × 78,999.49
4. Step 4: Simplify right side
   139,441.33x = 15,199,918,203.31
5. Step 5: Solve for x
   x = 15,199,918,203.31/139,441.33
6. Step 6: Final answer
   x = 109,005.83