Finding the Fourth Proportional to 142,356.42, 196,442.51 and 81,917.32

Step by Step Solution

1. Step 1: Write the proportion equation
   142,356.42 : 196,442.51 = 81,917.32 : x
2. Step 2: Convert to fraction form
   142,356.42/196,442.51 = 81,917.32/x
3. Step 3: Cross multiply
   142,356.42x = 196,442.51 × 81,917.32
4. Step 4: Simplify right side
   142,356.42x = 16,092,042,971.06
5. Step 5: Solve for x
   x = 16,092,042,971.06/142,356.42
6. Step 6: Final answer
   x = 113,040.51