Finding the Fourth Proportional to 105,366.42, 145,364.22 and 65,009.88

Step by Step Solution

1. Step 1: Write the proportion equation
   105,366.42 : 145,364.22 = 65,009.88 : x
2. Step 2: Convert to fraction form
   105,366.42/145,364.22 = 65,009.88/x
3. Step 3: Cross multiply
   105,366.42x = 145,364.22 × 65,009.88
4. Step 4: Simplify right side
   105,366.42x = 9,450,110,498.49
5. Step 5: Solve for x
   x = 9,450,110,498.49/105,366.42
6. Step 6: Final answer
   x = 89,688.07