Finding the Fourth Proportional to 142,112.89, 196,115.58 and 78,450.52

Step by Step Solution

1. Step 1: Write the proportion equation
   142,112.89 : 196,115.58 = 78,450.52 : x
2. Step 2: Convert to fraction form
   142,112.89/196,115.58 = 78,450.52/x
3. Step 3: Cross multiply
   142,112.89x = 196,115.58 × 78,450.52
4. Step 4: Simplify right side
   142,112.89x = 15,385,369,231.10
5. Step 5: Solve for x
   x = 15,385,369,231.10/142,112.89
6. Step 6: Final answer
   x = 108,261.60