Finding the Fourth Proportional to 142,316.96, 196,405 and 81,896.80

Step by Step Solution

1. Step 1: Write the proportion equation
   142,316.96 : 196,405 = 81,896.80 : x
2. Step 2: Convert to fraction form
   142,316.96/196,405 = 81,896.80/x
3. Step 3: Cross multiply
   142,316.96x = 196,405 × 81,896.80
4. Step 4: Simplify right side
   142,316.96x = 16,084,941,004
5. Step 5: Solve for x
   x = 16,084,941,004/142,316.96
6. Step 6: Final answer
   x = 113,021.95