Finding the Third Proportional to 303,412.50 and 615,438

Step by Step Solution

1. Step 1: Write the proportion equation
   303,412.50 : 615,438 = 615,438 : x
2. Step 2: Convert to fraction form
   303,412.50/615,438 = 615,438/x
3. Step 3: Cross multiply
   303,412.50x = 615,438 × 615,438
4. Step 4: Simplify right side
   303,412.50x = 378,763,931,844
5. Step 5: Solve for x
   x = 378,763,931,844/303,412.50
6. Step 6: Final answer
   x = 1,248,346.50