Finding the Fourth Proportional to 142,619.82, 196,807.85 and 78,076.68

Step by Step Solution

1. Step 1: Write the proportion equation
   142,619.82 : 196,807.85 = 78,076.68 : x
2. Step 2: Convert to fraction form
   142,619.82/196,807.85 = 78,076.68/x
3. Step 3: Cross multiply
   142,619.82x = 196,807.85 × 78,076.68
4. Step 4: Simplify right side
   142,619.82x = 15,366,103,525.94
5. Step 5: Solve for x
   x = 15,366,103,525.94/142,619.82
6. Step 6: Final answer
   x = 107,741.71