Finding the Fourth Proportional to 142,395.12, 196,554.69 and 81,989.82

Step by Step Solution

1. Step 1: Write the proportion equation
   142,395.12 : 196,554.69 = 81,989.82 : x
2. Step 2: Convert to fraction form
   142,395.12/196,554.69 = 81,989.82/x
3. Step 3: Cross multiply
   142,395.12x = 196,554.69 × 81,989.82
4. Step 4: Simplify right side
   142,395.12x = 16,115,483,653.26
5. Step 5: Solve for x
   x = 16,115,483,653.26/142,395.12
6. Step 6: Final answer
   x = 113,174.41