Finding the Fourth Proportional to 105,582.40, 145,584.12 and 67,290.72

Step by Step Solution

1. Step 1: Write the proportion equation
   105,582.40 : 145,584.12 = 67,290.72 : x
2. Step 2: Convert to fraction form
   105,582.40/145,584.12 = 67,290.72/x
3. Step 3: Cross multiply
   105,582.40x = 145,584.12 × 67,290.72
4. Step 4: Simplify right side
   105,582.40x = 9,796,460,255.37
5. Step 5: Solve for x
   x = 9,796,460,255.37/105,582.40
6. Step 6: Final answer
   x = 92,784.97