Finding the Fourth Proportional to 123,099.65, 169,764.77 and 80,681.57

Step by Step Solution

1. Step 1: Write the proportion equation
   123,099.65 : 169,764.77 = 80,681.57 : x
2. Step 2: Convert to fraction form
   123,099.65/169,764.77 = 80,681.57/x
3. Step 3: Cross multiply
   123,099.65x = 169,764.77 × 80,681.57
4. Step 4: Simplify right side
   123,099.65x = 13,696,887,770.88
5. Step 5: Solve for x
   x = 13,696,887,770.88/123,099.65
6. Step 6: Final answer
   x = 111,266.67