Finding the Fourth Proportional to 142,080.04, 196,076.82 and 81,670.12

Step by Step Solution

1. Step 1: Write the proportion equation
   142,080.04 : 196,076.82 = 81,670.12 : x
2. Step 2: Convert to fraction form
   142,080.04/196,076.82 = 81,670.12/x
3. Step 3: Cross multiply
   142,080.04x = 196,076.82 × 81,670.12
4. Step 4: Simplify right side
   142,080.04x = 16,013,617,418.62
5. Step 5: Solve for x
   x = 16,013,617,418.62/142,080.04
6. Step 6: Final answer
   x = 112,708.42