Finding the Fourth Proportional to 123,559.34, 185,339.99 and 80,900.72

Step by Step Solution

1. Step 1: Write the proportion equation
   123,559.34 : 185,339.99 = 80,900.72 : x
2. Step 2: Convert to fraction form
   123,559.34/185,339.99 = 80,900.72/x
3. Step 3: Cross multiply
   123,559.34x = 185,339.99 × 80,900.72
4. Step 4: Simplify right side
   123,559.34x = 14,994,138,606.37
5. Step 5: Solve for x
   x = 14,994,138,606.37/123,559.34
6. Step 6: Final answer
   x = 121,351.73