Finding the Fourth Proportional to 80,493, 111,085.20 and 48,669.72

Step by Step Solution

1. Step 1: Write the proportion equation
   80,493 : 111,085.20 = 48,669.72 : x
2. Step 2: Convert to fraction form
   80,493/111,085.20 = 48,669.72/x
3. Step 3: Cross multiply
   80,493x = 111,085.20 × 48,669.72
4. Step 4: Simplify right side
   80,493x = 5,406,485,580.14
5. Step 5: Solve for x
   x = 5,406,485,580.14/80,493
6. Step 6: Final answer
   x = 67,167.15