Finding the Fourth Proportional to 300,192.40, 450,288.52 and 142,334.72

Step by Step Solution

1. Step 1: Write the proportion equation
   300,192.40 : 450,288.52 = 142,334.72 : x
2. Step 2: Convert to fraction form
   300,192.40/450,288.52 = 142,334.72/x
3. Step 3: Cross multiply
   300,192.40x = 450,288.52 × 142,334.72
4. Step 4: Simplify right side
   300,192.40x = 64,091,690,413.41
5. Step 5: Solve for x
   x = 64,091,690,413.41/300,192.40
6. Step 6: Final answer
   x = 213,502.04