Finding the Fourth Proportional to 300,046.88, 450,291.85 and 142,275.89

Step by Step Solution

1. Step 1: Write the proportion equation
   300,046.88 : 450,291.85 = 142,275.89 : x
2. Step 2: Convert to fraction form
   300,046.88/450,291.85 = 142,275.89/x
3. Step 3: Cross multiply
   300,046.88x = 450,291.85 × 142,275.89
4. Step 4: Simplify right side
   300,046.88x = 64,065,671,467.04
5. Step 5: Solve for x
   x = 64,065,671,467.04/300,046.88
6. Step 6: Final answer
   x = 213,518.88