Finding the Fourth Proportional to 105,762.29, 145,869.46 and 65,498.40

Step by Step Solution

1. Step 1: Write the proportion equation
   105,762.29 : 145,869.46 = 65,498.40 : x
2. Step 2: Convert to fraction form
   105,762.29/145,869.46 = 65,498.40/x
3. Step 3: Cross multiply
   105,762.29x = 145,869.46 × 65,498.40
4. Step 4: Simplify right side
   105,762.29x = 9,554,216,075.12
5. Step 5: Solve for x
   x = 9,554,216,075.12/105,762.29
6. Step 6: Final answer
   x = 90,336.70