Finding the Fourth Proportional to 142,493.30, 196,639.89 and 78,829.73

Step by Step Solution

1. Step 1: Write the proportion equation
   142,493.30 : 196,639.89 = 78,829.73 : x
2. Step 2: Convert to fraction form
   142,493.30/196,639.89 = 78,829.73/x
3. Step 3: Cross multiply
   142,493.30x = 196,639.89 × 78,829.73
4. Step 4: Simplify right side
   142,493.30x = 15,501,069,435.93
5. Step 5: Solve for x
   x = 15,501,069,435.93/142,493.30
6. Step 6: Final answer
   x = 108,784.55