Finding the Fourth Proportional to 123,456.24, 185,185.98 and 81,605.16

Step by Step Solution

1. Step 1: Write the proportion equation
   123,456.24 : 185,185.98 = 81,605.16 : x
2. Step 2: Convert to fraction form
   123,456.24/185,185.98 = 81,605.16/x
3. Step 3: Cross multiply
   123,456.24x = 185,185.98 × 81,605.16
4. Step 4: Simplify right side
   123,456.24x = 15,112,131,527.66
5. Step 5: Solve for x
   x = 15,112,131,527.66/123,456.24
6. Step 6: Final answer
   x = 122,408.81