Finding the Fourth Proportional to 140,105.43, 193,351.05 and 79,681.59

Step by Step Solution

1. Step 1: Write the proportion equation
   140,105.43 : 193,351.05 = 79,681.59 : x
2. Step 2: Convert to fraction form
   140,105.43/193,351.05 = 79,681.59/x
3. Step 3: Cross multiply
   140,105.43x = 193,351.05 × 79,681.59
4. Step 4: Simplify right side
   140,105.43x = 15,406,519,092.17
5. Step 5: Solve for x
   x = 15,406,519,092.17/140,105.43
6. Step 6: Final answer
   x = 109,963.75