Finding the Fourth Proportional to 406,795.98, 561,264.83 and 320,487.06

Step by Step Solution

1. Step 1: Write the proportion equation
   406,795.98 : 561,264.83 = 320,487.06 : x
2. Step 2: Convert to fraction form
   406,795.98/561,264.83 = 320,487.06/x
3. Step 3: Cross multiply
   406,795.98x = 561,264.83 × 320,487.06
4. Step 4: Simplify right side
   406,795.98x = 179,878,116,162.96
5. Step 5: Solve for x
   x = 179,878,116,162.96/406,795.98
6. Step 6: Final answer
   x = 442,182.63