Finding the Fourth Proportional to 142,875.40, 196,588.56 and 117,287.68

Step by Step Solution

1. Step 1: Write the proportion equation
   142,875.40 : 196,588.56 = 117,287.68 : x
2. Step 2: Convert to fraction form
   142,875.40/196,588.56 = 117,287.68/x
3. Step 3: Cross multiply
   142,875.40x = 196,588.56 × 117,287.68
4. Step 4: Simplify right side
   142,875.40x = 23,057,416,116.94
5. Step 5: Solve for x
   x = 23,057,416,116.94/142,875.40
6. Step 6: Final answer
   x = 161,381.29