Finding the Third Proportional to 290,376 and 683,178.75

Step by Step Solution

1. Step 1: Write the proportion equation
   290,376 : 683,178.75 = 683,178.75 : x
2. Step 2: Convert to fraction form
   290,376/683,178.75 = 683,178.75/x
3. Step 3: Cross multiply
   290,376x = 683,178.75 × 683,178.75
4. Step 4: Simplify right side
   290,376x = 466,733,204,451.56
5. Step 5: Solve for x
   x = 466,733,204,451.56/290,376
6. Step 6: Final answer
   x = 1,607,340.84