Finding the Fourth Proportional to 300,194.38, 450,291.52 and 142,336.72

Step by Step Solution

1. Step 1: Write the proportion equation
   300,194.38 : 450,291.52 = 142,336.72 : x
2. Step 2: Convert to fraction form
   300,194.38/450,291.52 = 142,336.72/x
3. Step 3: Cross multiply
   300,194.38x = 450,291.52 × 142,336.72
4. Step 4: Simplify right side
   300,194.38x = 64,093,018,000.61
5. Step 5: Solve for x
   x = 64,093,018,000.61/300,194.38
6. Step 6: Final answer
   x = 213,505.06