Finding the Fourth Proportional to 140,121.78, 193,368.06 and 89,820.78

Step by Step Solution

1. Step 1: Write the proportion equation
   140,121.78 : 193,368.06 = 89,820.78 : x
2. Step 2: Convert to fraction form
   140,121.78/193,368.06 = 89,820.78/x
3. Step 3: Cross multiply
   140,121.78x = 193,368.06 × 89,820.78
4. Step 4: Simplify right side
   140,121.78x = 17,368,469,976.29
5. Step 5: Solve for x
   x = 17,368,469,976.29/140,121.78
6. Step 6: Final answer
   x = 123,952.68