Finding the Fourth Proportional to 142,112.16, 196,114.82 and 78,450

Step by Step Solution

1. Step 1: Write the proportion equation
   142,112.16 : 196,114.82 = 78,450 : x
2. Step 2: Convert to fraction form
   142,112.16/196,114.82 = 78,450/x
3. Step 3: Cross multiply
   142,112.16x = 196,114.82 × 78,450
4. Step 4: Simplify right side
   142,112.16x = 15,385,207,236.75
5. Step 5: Solve for x
   x = 15,385,207,236.75/142,112.16
6. Step 6: Final answer
   x = 108,261.02