Finding the Fourth Proportional to 646,131.18, 969,196.55 and 172,804.25

Step by Step Solution

1. Step 1: Write the proportion equation
   646,131.18 : 969,196.55 = 172,804.25 : x
2. Step 2: Convert to fraction form
   646,131.18/969,196.55 = 172,804.25/x
3. Step 3: Cross multiply
   646,131.18x = 969,196.55 × 172,804.25
4. Step 4: Simplify right side
   646,131.18x = 167,481,277,215.33
5. Step 5: Solve for x
   x = 167,481,277,215.33/646,131.18
6. Step 6: Final answer
   x = 259,206.31