Finding the Fourth Proportional to 424,019.05, 635,779.50 and 171,307.56

Step by Step Solution

1. Step 1: Write the proportion equation
   424,019.05 : 635,779.50 = 171,307.56 : x
2. Step 2: Convert to fraction form
   424,019.05/635,779.50 = 171,307.56/x
3. Step 3: Cross multiply
   424,019.05x = 635,779.50 × 171,307.56
4. Step 4: Simplify right side
   424,019.05x = 108,913,834,843.02
5. Step 5: Solve for x
   x = 108,913,834,843.02/424,019.05
6. Step 6: Final answer
   x = 256,860.71