Finding the Fourth Proportional to 404,145.30, 606,160.35 and 137,918.10

Step by Step Solution

1. Step 1: Write the proportion equation
   404,145.30 : 606,160.35 = 137,918.10 : x
2. Step 2: Convert to fraction form
   404,145.30/606,160.35 = 137,918.10/x
3. Step 3: Cross multiply
   404,145.30x = 606,160.35 × 137,918.10
4. Step 4: Simplify right side
   404,145.30x = 83,600,483,767.34
5. Step 5: Solve for x
   x = 83,600,483,767.34/404,145.30
6. Step 6: Final answer
   x = 206,857.49