Finding the Fourth Proportional to 142,346.27, 196,457.39 and 81,915.68

Step by Step Solution

1. Step 1: Write the proportion equation
   142,346.27 : 196,457.39 = 81,915.68 : x
2. Step 2: Convert to fraction form
   142,346.27/196,457.39 = 81,915.68/x
3. Step 3: Cross multiply
   142,346.27x = 196,457.39 × 81,915.68
4. Step 4: Simplify right side
   142,346.27x = 16,092,939,301.01
5. Step 5: Solve for x
   x = 16,092,939,301.01/142,346.27
6. Step 6: Final answer
   x = 113,054.88