Finding the Fourth Proportional to 140,978.76, 194,519.17 and 80,530.08

Step by Step Solution

1. Step 1: Write the proportion equation
   140,978.76 : 194,519.17 = 80,530.08 : x
2. Step 2: Convert to fraction form
   140,978.76/194,519.17 = 80,530.08/x
3. Step 3: Cross multiply
   140,978.76x = 194,519.17 × 80,530.08
4. Step 4: Simplify right side
   140,978.76x = 15,664,644,321.63
5. Step 5: Solve for x
   x = 15,664,644,321.63/140,978.76
6. Step 6: Final answer
   x = 111,113.51