Finding the Fourth Proportional to 105,112.96, 144,990.98 and 74,907.96

Step by Step Solution

1. Step 1: Write the proportion equation
   105,112.96 : 144,990.98 = 74,907.96 : x
2. Step 2: Convert to fraction form
   105,112.96/144,990.98 = 74,907.96/x
3. Step 3: Cross multiply
   105,112.96x = 144,990.98 × 74,907.96
4. Step 4: Simplify right side
   105,112.96x = 10,860,978,530.20
5. Step 5: Solve for x
   x = 10,860,978,530.20/105,112.96
6. Step 6: Final answer
   x = 103,326.73