Finding the Fourth Proportional to 404,340.30, 606,401.10 and 120,030.30

Step by Step Solution

1. Step 1: Write the proportion equation
   404,340.30 : 606,401.10 = 120,030.30 : x
2. Step 2: Convert to fraction form
   404,340.30/606,401.10 = 120,030.30/x
3. Step 3: Cross multiply
   404,340.30x = 606,401.10 × 120,030.30
4. Step 4: Simplify right side
   404,340.30x = 72,786,505,953.33
5. Step 5: Solve for x
   x = 72,786,505,953.33/404,340.30
6. Step 6: Final answer
   x = 180,012.99