Finding the Fourth Proportional to 324,111.69, 486,219.38 and 137,124.81

Step by Step Solution

1. Step 1: Write the proportion equation
   324,111.69 : 486,219.38 = 137,124.81 : x
2. Step 2: Convert to fraction form
   324,111.69/486,219.38 = 137,124.81/x
3. Step 3: Cross multiply
   324,111.69x = 486,219.38 × 137,124.81
4. Step 4: Simplify right side
   324,111.69x = 66,672,740,100.82
5. Step 5: Solve for x
   x = 66,672,740,100.82/324,111.69
6. Step 6: Final answer
   x = 205,709.15