Finding the Fourth Proportional to 73,019.25, 100,766.70 and 39,485.25

Step by Step Solution

1. Step 1: Write the proportion equation
   73,019.25 : 100,766.70 = 39,485.25 : x
2. Step 2: Convert to fraction form
   73,019.25/100,766.70 = 39,485.25/x
3. Step 3: Cross multiply
   73,019.25x = 100,766.70 × 39,485.25
4. Step 4: Simplify right side
   73,019.25x = 3,978,798,341.18
5. Step 5: Solve for x
   x = 3,978,798,341.18/73,019.25
6. Step 6: Final answer
   x = 54,489.72