Finding the Fourth Proportional to 323,143.88, 445,870.96 and 187,128.88

Step by Step Solution

1. Step 1: Write the proportion equation
   323,143.88 : 445,870.96 = 187,128.88 : x
2. Step 2: Convert to fraction form
   323,143.88/445,870.96 = 187,128.88/x
3. Step 3: Cross multiply
   323,143.88x = 445,870.96 × 187,128.88
4. Step 4: Simplify right side
   323,143.88x = 83,435,333,369.32
5. Step 5: Solve for x
   x = 83,435,333,369.32/323,143.88
6. Step 6: Final answer
   x = 258,198.71