Finding the Fourth Proportional to 320,139.36, 479,825.52 and 149,130.56

Step by Step Solution

1. Step 1: Write the proportion equation
   320,139.36 : 479,825.52 = 149,130.56 : x
2. Step 2: Convert to fraction form
   320,139.36/479,825.52 = 149,130.56/x
3. Step 3: Cross multiply
   320,139.36x = 479,825.52 × 149,130.56
4. Step 4: Simplify right side
   320,139.36x = 71,556,648,499.89
5. Step 5: Solve for x
   x = 71,556,648,499.89/320,139.36
6. Step 6: Final answer
   x = 223,517.18