Finding the Fourth Proportional to 418,586.50, 627,879.78 and 123,098.50

Step by Step Solution

1. Step 1: Write the proportion equation
   418,586.50 : 627,879.78 = 123,098.50 : x
2. Step 2: Convert to fraction form
   418,586.50/627,879.78 = 123,098.50/x
3. Step 3: Cross multiply
   418,586.50x = 627,879.78 × 123,098.50
4. Step 4: Simplify right side
   418,586.50x = 77,291,059,098.33
5. Step 5: Solve for x
   x = 77,291,059,098.33/418,586.50
6. Step 6: Final answer
   x = 184,647.76