Finding the Fourth Proportional to 140,640.57, 193,900.68 and 89,634.69

Step by Step Solution

1. Step 1: Write the proportion equation
   140,640.57 : 193,900.68 = 89,634.69 : x
2. Step 2: Convert to fraction form
   140,640.57/193,900.68 = 89,634.69/x
3. Step 3: Cross multiply
   140,640.57x = 193,900.68 × 89,634.69
4. Step 4: Simplify right side
   140,640.57x = 17,380,227,342.59
5. Step 5: Solve for x
   x = 17,380,227,342.59/140,640.57
6. Step 6: Final answer
   x = 123,579.05