Finding the Fourth Proportional to 80,221.61, 120,196.32 and 48,991.25

Step by Step Solution

1. Step 1: Write the proportion equation
   80,221.61 : 120,196.32 = 48,991.25 : x
2. Step 2: Convert to fraction form
   80,221.61/120,196.32 = 48,991.25/x
3. Step 3: Cross multiply
   80,221.61x = 120,196.32 × 48,991.25
4. Step 4: Simplify right side
   80,221.61x = 5,888,567,361.22
5. Step 5: Solve for x
   x = 5,888,567,361.22/80,221.61
6. Step 6: Final answer
   x = 73,403.76