Finding the Fourth Proportional to 438,300.26, 657,469.15 and 172,118.37

Step by Step Solution

1. Step 1: Write the proportion equation
   438,300.26 : 657,469.15 = 172,118.37 : x
2. Step 2: Convert to fraction form
   438,300.26/657,469.15 = 172,118.37/x
3. Step 3: Cross multiply
   438,300.26x = 657,469.15 × 172,118.37
4. Step 4: Simplify right side
   438,300.26x = 113,162,517,728.40
5. Step 5: Solve for x
   x = 113,162,517,728.40/438,300.26
6. Step 6: Final answer
   x = 258,184.92