Finding the Fourth Proportional to 140,678.48, 194,138.72 and 86,962.12

Step by Step Solution

1. Step 1: Write the proportion equation
   140,678.48 : 194,138.72 = 86,962.12 : x
2. Step 2: Convert to fraction form
   140,678.48/194,138.72 = 86,962.12/x
3. Step 3: Cross multiply
   140,678.48x = 194,138.72 × 86,962.12
4. Step 4: Simplify right side
   140,678.48x = 16,882,714,665.29
5. Step 5: Solve for x
   x = 16,882,714,665.29/140,678.48
6. Step 6: Final answer
   x = 120,009.22