Finding the Fourth Proportional to 142,034.72, 196,013.70 and 81,624.30

Step by Step Solution

1. Step 1: Write the proportion equation
   142,034.72 : 196,013.70 = 81,624.30 : x
2. Step 2: Convert to fraction form
   142,034.72/196,013.70 = 81,624.30/x
3. Step 3: Cross multiply
   142,034.72x = 196,013.70 × 81,624.30
4. Step 4: Simplify right side
   142,034.72x = 15,999,481,052.91
5. Step 5: Solve for x
   x = 15,999,481,052.91/142,034.72
6. Step 6: Final answer
   x = 112,644.86