Finding the Fourth Proportional to 404,123.80, 606,128.10 and 137,896.60

Step by Step Solution

1. Step 1: Write the proportion equation
   404,123.80 : 606,128.10 = 137,896.60 : x
2. Step 2: Convert to fraction form
   404,123.80/606,128.10 = 137,896.60/x
3. Step 3: Cross multiply
   404,123.80x = 606,128.10 × 137,896.60
4. Step 4: Simplify right side
   404,123.80x = 83,583,004,154.46
5. Step 5: Solve for x
   x = 83,583,004,154.46/404,123.80
6. Step 6: Final answer
   x = 206,825.25