Finding the Fourth Proportional to 102,868.38, 141,642.78 and 90,049.83

Step by Step Solution

1. Step 1: Write the proportion equation
   102,868.38 : 141,642.78 = 90,049.83 : x
2. Step 2: Convert to fraction form
   102,868.38/141,642.78 = 90,049.83/x
3. Step 3: Cross multiply
   102,868.38x = 141,642.78 × 90,049.83
4. Step 4: Simplify right side
   102,868.38x = 12,754,907,390.88
5. Step 5: Solve for x
   x = 12,754,907,390.88/102,868.38
6. Step 6: Final answer
   x = 123,992.50