Finding the Fourth Proportional to 331,089.72, 456,899.40 and 195,129.42

Step by Step Solution

1. Step 1: Write the proportion equation
   331,089.72 : 456,899.40 = 195,129.42 : x
2. Step 2: Convert to fraction form
   331,089.72/456,899.40 = 195,129.42/x
3. Step 3: Cross multiply
   331,089.72x = 456,899.40 × 195,129.42
4. Step 4: Simplify right side
   331,089.72x = 89,154,514,920.35
5. Step 5: Solve for x
   x = 89,154,514,920.35/331,089.72
6. Step 6: Final answer
   x = 269,276.00