Finding the Fourth Proportional to 142,448.82, 196,573.86 and 78,787.68

Step by Step Solution

1. Step 1: Write the proportion equation
   142,448.82 : 196,573.86 = 78,787.68 : x
2. Step 2: Convert to fraction form
   142,448.82/196,573.86 = 78,787.68/x
3. Step 3: Cross multiply
   142,448.82x = 196,573.86 × 78,787.68
4. Step 4: Simplify right side
   142,448.82x = 15,487,598,378.04
5. Step 5: Solve for x
   x = 15,487,598,378.04/142,448.82
6. Step 6: Final answer
   x = 108,723.95