Finding the Fourth Proportional to 142,489.30, 196,634.37 and 78,825.73

Step by Step Solution

1. Step 1: Write the proportion equation
   142,489.30 : 196,634.37 = 78,825.73 : x
2. Step 2: Convert to fraction form
   142,489.30/196,634.37 = 78,825.73/x
3. Step 3: Cross multiply
   142,489.30x = 196,634.37 × 78,825.73
4. Step 4: Simplify right side
   142,489.30x = 15,499,847,758.34
5. Step 5: Solve for x
   x = 15,499,847,758.34/142,489.30
6. Step 6: Final answer
   x = 108,779.03