Finding the Fourth Proportional to 142,654.09, 196,860.24 and 78,990.52

Step by Step Solution

1. Step 1: Write the proportion equation
   142,654.09 : 196,860.24 = 78,990.52 : x
2. Step 2: Convert to fraction form
   142,654.09/196,860.24 = 78,990.52/x
3. Step 3: Cross multiply
   142,654.09x = 196,860.24 × 78,990.52
4. Step 4: Simplify right side
   142,654.09x = 15,550,092,724.92
5. Step 5: Solve for x
   x = 15,550,092,724.92/142,654.09
6. Step 6: Final answer
   x = 109,005.59