Finding the Fourth Proportional to 142,241.48, 196,298.88 and 81,812.05

Step by Step Solution

1. Step 1: Write the proportion equation
   142,241.48 : 196,298.88 = 81,812.05 : x
2. Step 2: Convert to fraction form
   142,241.48/196,298.88 = 81,812.05/x
3. Step 3: Cross multiply
   142,241.48x = 196,298.88 × 81,812.05
4. Step 4: Simplify right side
   142,241.48x = 16,059,613,785.50
5. Step 5: Solve for x
   x = 16,059,613,785.50/142,241.48
6. Step 6: Final answer
   x = 112,903.87