Finding the Fourth Proportional to 140,337.56, 193,600.86 and 80,687

Step by Step Solution

1. Step 1: Write the proportion equation
   140,337.56 : 193,600.86 = 80,687 : x
2. Step 2: Convert to fraction form
   140,337.56/193,600.86 = 80,687/x
3. Step 3: Cross multiply
   140,337.56x = 193,600.86 × 80,687
4. Step 4: Simplify right side
   140,337.56x = 15,621,072,590.82
5. Step 5: Solve for x
   x = 15,621,072,590.82/140,337.56
6. Step 6: Final answer
   x = 111,310.70