Finding the Third Proportional to 349,209 and 762,387.75

Step by Step Solution

1. Step 1: Write the proportion equation
   349,209 : 762,387.75 = 762,387.75 : x
2. Step 2: Convert to fraction form
   349,209/762,387.75 = 762,387.75/x
3. Step 3: Cross multiply
   349,209x = 762,387.75 × 762,387.75
4. Step 4: Simplify right side
   349,209x = 581,235,081,350.06
5. Step 5: Solve for x
   x = 581,235,081,350.06/349,209
6. Step 6: Final answer
   x = 1,664,433.28