Finding the Fourth Proportional to 300,218.56, 450,382.42 and 142,445.56

Step by Step Solution

1. Step 1: Write the proportion equation
   300,218.56 : 450,382.42 = 142,445.56 : x
2. Step 2: Convert to fraction form
   300,218.56/450,382.42 = 142,445.56/x
3. Step 3: Cross multiply
   300,218.56x = 450,382.42 × 142,445.56
4. Step 4: Simplify right side
   300,218.56x = 64,154,976,031.06
5. Step 5: Solve for x
   x = 64,154,976,031.06/300,218.56
6. Step 6: Final answer
   x = 213,694.24