Finding the Fourth Proportional to 80,990.61, 111,779.33 and 49,153.35

Step by Step Solution

1. Step 1: Write the proportion equation
   80,990.61 : 111,779.33 = 49,153.35 : x
2. Step 2: Convert to fraction form
   80,990.61/111,779.33 = 49,153.35/x
3. Step 3: Cross multiply
   80,990.61x = 111,779.33 × 49,153.35
4. Step 4: Simplify right side
   80,990.61x = 5,494,328,530.26
5. Step 5: Solve for x
   x = 5,494,328,530.26/80,990.61
6. Step 6: Final answer
   x = 67,839.08