Finding the Fourth Proportional to 140,335.56, 193,598.10 and 80,685

Step by Step Solution

1. Step 1: Write the proportion equation
   140,335.56 : 193,598.10 = 80,685 : x
2. Step 2: Convert to fraction form
   140,335.56/193,598.10 = 80,685/x
3. Step 3: Cross multiply
   140,335.56x = 193,598.10 × 80,685
4. Step 4: Simplify right side
   140,335.56x = 15,620,462,698.50
5. Step 5: Solve for x
   x = 15,620,462,698.50/140,335.56
6. Step 6: Final answer
   x = 111,307.94