Finding the Fourth Proportional to 142,388.34, 196,504.71 and 81,957.66

Step by Step Solution

1. Step 1: Write the proportion equation
   142,388.34 : 196,504.71 = 81,957.66 : x
2. Step 2: Convert to fraction form
   142,388.34/196,504.71 = 81,957.66/x
3. Step 3: Cross multiply
   142,388.34x = 196,504.71 × 81,957.66
4. Step 4: Simplify right side
   142,388.34x = 16,105,066,210.58
5. Step 5: Solve for x
   x = 16,105,066,210.58/142,388.34
6. Step 6: Final answer
   x = 113,106.64