Finding the Fourth Proportional to 329,919.08, 494,779.89 and 172,061.42

Step by Step Solution

1. Step 1: Write the proportion equation
   329,919.08 : 494,779.89 = 172,061.42 : x
2. Step 2: Convert to fraction form
   329,919.08/494,779.89 = 172,061.42/x
3. Step 3: Cross multiply
   329,919.08x = 494,779.89 × 172,061.42
4. Step 4: Simplify right side
   329,919.08x = 85,132,528,632.17
5. Step 5: Solve for x
   x = 85,132,528,632.17/329,919.08
6. Step 6: Final answer
   x = 258,040.64