Finding the Fourth Proportional to 72,960, 100,685.04 and 39,426.24

Step by Step Solution

1. Step 1: Write the proportion equation
   72,960 : 100,685.04 = 39,426.24 : x
2. Step 2: Convert to fraction form
   72,960/100,685.04 = 39,426.24/x
3. Step 3: Cross multiply
   72,960x = 100,685.04 × 39,426.24
4. Step 4: Simplify right side
   72,960x = 3,969,632,551.45
5. Step 5: Solve for x
   x = 3,969,632,551.45/72,960
6. Step 6: Final answer
   x = 54,408.34