Finding the Fourth Proportional to 300,753.27, 450,818.87 and 142,861.59

Step by Step Solution

1. Step 1: Write the proportion equation
   300,753.27 : 450,818.87 = 142,861.59 : x
2. Step 2: Convert to fraction form
   300,753.27/450,818.87 = 142,861.59/x
3. Step 3: Cross multiply
   300,753.27x = 450,818.87 × 142,861.59
4. Step 4: Simplify right side
   300,753.27x = 64,404,699,855.90
5. Step 5: Solve for x
   x = 64,404,699,855.90/300,753.27
6. Step 6: Final answer
   x = 214,144.64