Finding the Fourth Proportional to 140,042.72, 193,196.44 and 86,308.13

Step by Step Solution

1. Step 1: Write the proportion equation
   140,042.72 : 193,196.44 = 86,308.13 : x
2. Step 2: Convert to fraction form
   140,042.72/193,196.44 = 86,308.13/x
3. Step 3: Cross multiply
   140,042.72x = 193,196.44 × 86,308.13
4. Step 4: Simplify right side
   140,042.72x = 16,674,424,049.93
5. Step 5: Solve for x
   x = 16,674,424,049.93/140,042.72
6. Step 6: Final answer
   x = 119,066.69