Finding the Fourth Proportional to 404,106.87, 606,138.31 and 123,624.12

Step by Step Solution

1. Step 1: Write the proportion equation
   404,106.87 : 606,138.31 = 123,624.12 : x
2. Step 2: Convert to fraction form
   404,106.87/606,138.31 = 123,624.12/x
3. Step 3: Cross multiply
   404,106.87x = 606,138.31 × 123,624.12
4. Step 4: Simplify right side
   404,106.87x = 74,933,315,172.04
5. Step 5: Solve for x
   x = 74,933,315,172.04/404,106.87
6. Step 6: Final answer
   x = 185,429.45