Finding the Fourth Proportional to 142,644.14, 196,851.33 and 78,112.34

Step by Step Solution

1. Step 1: Write the proportion equation
   142,644.14 : 196,851.33 = 78,112.34 : x
2. Step 2: Convert to fraction form
   142,644.14/196,851.33 = 78,112.34/x
3. Step 3: Cross multiply
   142,644.14x = 196,851.33 × 78,112.34
4. Step 4: Simplify right side
   142,644.14x = 15,376,518,018.41
5. Step 5: Solve for x
   x = 15,376,518,018.41/142,644.14
6. Step 6: Final answer
   x = 107,796.35