Finding the Fourth Proportional to 105,730.71, 145,907.71 and 60,422.55

Step by Step Solution

1. Step 1: Write the proportion equation
   105,730.71 : 145,907.71 = 60,422.55 : x
2. Step 2: Convert to fraction form
   105,730.71/145,907.71 = 60,422.55/x
3. Step 3: Cross multiply
   105,730.71x = 145,907.71 × 60,422.55
4. Step 4: Simplify right side
   105,730.71x = 8,816,115,751.80
5. Step 5: Solve for x
   x = 8,816,115,751.80/105,730.71
6. Step 6: Final answer
   x = 83,382.73