Finding the Fourth Proportional to 105,422.98, 145,433.46 and 65,122.24

Step by Step Solution

1. Step 1: Write the proportion equation
   105,422.98 : 145,433.46 = 65,122.24 : x
2. Step 2: Convert to fraction form
   105,422.98/145,433.46 = 65,122.24/x
3. Step 3: Cross multiply
   105,422.98x = 145,433.46 × 65,122.24
4. Step 4: Simplify right side
   105,422.98x = 9,470,952,686.15
5. Step 5: Solve for x
   x = 9,470,952,686.15/105,422.98
6. Step 6: Final answer
   x = 89,837.65