Finding the Fourth Proportional to 142,118.94, 196,124.28 and 78,456.98

Step by Step Solution

1. Step 1: Write the proportion equation
   142,118.94 : 196,124.28 = 78,456.98 : x
2. Step 2: Convert to fraction form
   142,118.94/196,124.28 = 78,456.98/x
3. Step 3: Cross multiply
   142,118.94x = 196,124.28 × 78,456.98
4. Step 4: Simplify right side
   142,118.94x = 15,387,318,713.47
5. Step 5: Solve for x
   x = 15,387,318,713.47/142,118.94
6. Step 6: Final answer
   x = 108,270.71