Finding the Fourth Proportional to 80,365.86, 120,480.72 and 49,135.50

Step by Step Solution

1. Step 1: Write the proportion equation
   80,365.86 : 120,480.72 = 49,135.50 : x
2. Step 2: Convert to fraction form
   80,365.86/120,480.72 = 49,135.50/x
3. Step 3: Cross multiply
   80,365.86x = 120,480.72 × 49,135.50
4. Step 4: Simplify right side
   80,365.86x = 5,919,880,417.56
5. Step 5: Solve for x
   x = 5,919,880,417.56/80,365.86
6. Step 6: Final answer
   x = 73,661.63