Finding the Third Proportional to 391,263 and 824,554.50

Step by Step Solution

1. Step 1: Write the proportion equation
   391,263 : 824,554.50 = 824,554.50 : x
2. Step 2: Convert to fraction form
   391,263/824,554.50 = 824,554.50/x
3. Step 3: Cross multiply
   391,263x = 824,554.50 × 824,554.50
4. Step 4: Simplify right side
   391,263x = 679,890,123,470.25
5. Step 5: Solve for x
   x = 679,890,123,470.25/391,263
6. Step 6: Final answer
   x = 1,737,680.60