Finding the Fourth Proportional to 410,598.72, 615,379.68 and 200,302.40

Step by Step Solution

1. Step 1: Write the proportion equation
   410,598.72 : 615,379.68 = 200,302.40 : x
2. Step 2: Convert to fraction form
   410,598.72/615,379.68 = 200,302.40/x
3. Step 3: Cross multiply
   410,598.72x = 615,379.68 × 200,302.40
4. Step 4: Simplify right side
   410,598.72x = 123,262,026,815.23
5. Step 5: Solve for x
   x = 123,262,026,815.23/410,598.72
6. Step 6: Final answer
   x = 300,200.71