Finding the Fourth Proportional to 546,404.34, 819,606.51 and 172,456.50

Step by Step Solution

1. Step 1: Write the proportion equation
   546,404.34 : 819,606.51 = 172,456.50 : x
2. Step 2: Convert to fraction form
   546,404.34/819,606.51 = 172,456.50/x
3. Step 3: Cross multiply
   546,404.34x = 819,606.51 × 172,456.50
4. Step 4: Simplify right side
   546,404.34x = 141,346,470,091.82
5. Step 5: Solve for x
   x = 141,346,470,091.82/546,404.34
6. Step 6: Final answer
   x = 258,684.75