Finding the Fourth Proportional to 142,404.48, 196,512.28 and 81,981.32

Step by Step Solution

1. Step 1: Write the proportion equation
   142,404.48 : 196,512.28 = 81,981.32 : x
2. Step 2: Convert to fraction form
   142,404.48/196,512.28 = 81,981.32/x
3. Step 3: Cross multiply
   142,404.48x = 196,512.28 × 81,981.32
4. Step 4: Simplify right side
   142,404.48x = 16,110,334,923.09
5. Step 5: Solve for x
   x = 16,110,334,923.09/142,404.48
6. Step 6: Final answer
   x = 113,130.82