Finding the Third Proportional to 423,306 and 905,620.50

Step by Step Solution

1. Step 1: Write the proportion equation
   423,306 : 905,620.50 = 905,620.50 : x
2. Step 2: Convert to fraction form
   423,306/905,620.50 = 905,620.50/x
3. Step 3: Cross multiply
   423,306x = 905,620.50 × 905,620.50
4. Step 4: Simplify right side
   423,306x = 820,148,490,020.25
5. Step 5: Solve for x
   x = 820,148,490,020.25/423,306
6. Step 6: Final answer
   x = 1,937,483.74