Finding the Fourth Proportional to 423,404.48, 634,965.78 and 123,902.12

Step by Step Solution

1. Step 1: Write the proportion equation
   423,404.48 : 634,965.78 = 123,902.12 : x
2. Step 2: Convert to fraction form
   423,404.48/634,965.78 = 123,902.12/x
3. Step 3: Cross multiply
   423,404.48x = 634,965.78 × 123,902.12
4. Step 4: Simplify right side
   423,404.48x = 78,673,606,269.45
5. Step 5: Solve for x
   x = 78,673,606,269.45/423,404.48
6. Step 6: Final answer
   x = 185,811.94