Finding the Fourth Proportional to 123,585.69, 185,530.02 and 81,500.94

Step by Step Solution

1. Step 1: Write the proportion equation
   123,585.69 : 185,530.02 = 81,500.94 : x
2. Step 2: Convert to fraction form
   123,585.69/185,530.02 = 81,500.94/x
3. Step 3: Cross multiply
   123,585.69x = 185,530.02 × 81,500.94
4. Step 4: Simplify right side
   123,585.69x = 15,120,871,028.22
5. Step 5: Solve for x
   x = 15,120,871,028.22/123,585.69
6. Step 6: Final answer
   x = 122,351.31