Finding the Fourth Proportional to 105,665.24, 145,832.97 and 65,391.98

Step by Step Solution

1. Step 1: Write the proportion equation
   105,665.24 : 145,832.97 = 65,391.98 : x
2. Step 2: Convert to fraction form
   105,665.24/145,832.97 = 65,391.98/x
3. Step 3: Cross multiply
   105,665.24x = 145,832.97 × 65,391.98
4. Step 4: Simplify right side
   105,665.24x = 9,536,306,657.58
5. Step 5: Solve for x
   x = 9,536,306,657.58/105,665.24
6. Step 6: Final answer
   x = 90,250.18