Finding the Fourth Proportional to 300,046.38, 450,291.10 and 142,275.39

Step by Step Solution

1. Step 1: Write the proportion equation
   300,046.38 : 450,291.10 = 142,275.39 : x
2. Step 2: Convert to fraction form
   300,046.38/450,291.10 = 142,275.39/x
3. Step 3: Cross multiply
   300,046.38x = 450,291.10 × 142,275.39
4. Step 4: Simplify right side
   300,046.38x = 64,065,339,258.89
5. Step 5: Solve for x
   x = 64,065,339,258.89/300,046.38
6. Step 6: Final answer
   x = 213,518.12