Finding the Fourth Proportional to 142,539.95, 196,694.83 and 78,878.81

Step by Step Solution

1. Step 1: Write the proportion equation
   142,539.95 : 196,694.83 = 78,878.81 : x
2. Step 2: Convert to fraction form
   142,539.95/196,694.83 = 78,878.81/x
3. Step 3: Cross multiply
   142,539.95x = 196,694.83 × 78,878.81
4. Step 4: Simplify right side
   142,539.95x = 15,515,054,713.89
5. Step 5: Solve for x
   x = 15,515,054,713.89/142,539.95
6. Step 6: Final answer
   x = 108,847.06