Finding the Fourth Proportional to 140,116.78, 193,361.16 and 89,815.78

Step by Step Solution

1. Step 1: Write the proportion equation
   140,116.78 : 193,361.16 = 89,815.78 : x
2. Step 2: Convert to fraction form
   140,116.78/193,361.16 = 89,815.78/x
3. Step 3: Cross multiply
   140,116.78x = 193,361.16 × 89,815.78
4. Step 4: Simplify right side
   140,116.78x = 17,366,883,407.10
5. Step 5: Solve for x
   x = 17,366,883,407.10/140,116.78
6. Step 6: Final answer
   x = 123,945.78