Finding the Fourth Proportional to 258,196.38, 356,303.88 and 143,472.06

Step by Step Solution

1. Step 1: Write the proportion equation
   258,196.38 : 356,303.88 = 143,472.06 : x
2. Step 2: Convert to fraction form
   258,196.38/356,303.88 = 143,472.06/x
3. Step 3: Cross multiply
   258,196.38x = 356,303.88 × 143,472.06
4. Step 4: Simplify right side
   258,196.38x = 51,119,651,649.59
5. Step 5: Solve for x
   x = 51,119,651,649.59/258,196.38
6. Step 6: Final answer
   x = 197,987.48