Finding the Fourth Proportional to 406,054.38, 609,139.89 and 125,593.50

Step by Step Solution

1. Step 1: Write the proportion equation
   406,054.38 : 609,139.89 = 125,593.50 : x
2. Step 2: Convert to fraction form
   406,054.38/609,139.89 = 125,593.50/x
3. Step 3: Cross multiply
   406,054.38x = 609,139.89 × 125,593.50
4. Step 4: Simplify right side
   406,054.38x = 76,504,010,774.72
5. Step 5: Solve for x
   x = 76,504,010,774.72/406,054.38
6. Step 6: Final answer
   x = 188,408.29