Finding the Fourth Proportional to 105,743.80, 145,849.98 and 89,803

Step by Step Solution

1. Step 1: Write the proportion equation
   105,743.80 : 145,849.98 = 89,803 : x
2. Step 2: Convert to fraction form
   105,743.80/145,849.98 = 89,803/x
3. Step 3: Cross multiply
   105,743.80x = 145,849.98 × 89,803
4. Step 4: Simplify right side
   105,743.80x = 13,097,765,753.94
5. Step 5: Solve for x
   x = 13,097,765,753.94/105,743.80
6. Step 6: Final answer
   x = 123,863.20