Finding the Third Proportional to 290,836.50 and 615,204

Step by Step Solution

1. Step 1: Write the proportion equation
   290,836.50 : 615,204 = 615,204 : x
2. Step 2: Convert to fraction form
   290,836.50/615,204 = 615,204/x
3. Step 3: Cross multiply
   290,836.50x = 615,204 × 615,204
4. Step 4: Simplify right side
   290,836.50x = 378,475,961,616
5. Step 5: Solve for x
   x = 378,475,961,616/290,836.50
6. Step 6: Final answer
   x = 1,301,335.84