Finding the Fourth Proportional to 408,111.53, 612,168.74 and 123,804.56

Step by Step Solution

1. Step 1: Write the proportion equation
   408,111.53 : 612,168.74 = 123,804.56 : x
2. Step 2: Convert to fraction form
   408,111.53/612,168.74 = 123,804.56/x
3. Step 3: Cross multiply
   408,111.53x = 612,168.74 × 123,804.56
4. Step 4: Simplify right side
   408,111.53x = 75,789,277,821.59
5. Step 5: Solve for x
   x = 75,789,277,821.59/408,111.53
6. Step 6: Final answer
   x = 185,707.27