Finding the Fourth Proportional to 142,114.45, 196,112.81 and 78,450.88

Step by Step Solution

1. Step 1: Write the proportion equation
   142,114.45 : 196,112.81 = 78,450.88 : x
2. Step 2: Convert to fraction form
   142,114.45/196,112.81 = 78,450.88/x
3. Step 3: Cross multiply
   142,114.45x = 196,112.81 × 78,450.88
4. Step 4: Simplify right side
   142,114.45x = 15,385,222,621.80
5. Step 5: Solve for x
   x = 15,385,222,621.80/142,114.45
6. Step 6: Final answer
   x = 108,259.38