Finding the Fourth Proportional to 142,460.20, 196,533.30 and 85,839.40

Step by Step Solution

1. Step 1: Write the proportion equation
   142,460.20 : 196,533.30 = 85,839.40 : x
2. Step 2: Convert to fraction form
   142,460.20/196,533.30 = 85,839.40/x
3. Step 3: Cross multiply
   142,460.20x = 196,533.30 × 85,839.40
4. Step 4: Simplify right side
   142,460.20x = 16,870,300,552.02
5. Step 5: Solve for x
   x = 16,870,300,552.02/142,460.20
6. Step 6: Final answer
   x = 118,421.15