Finding the Third Proportional to 663,402 and 994,059.75

Step by Step Solution

1. Step 1: Write the proportion equation
   663,402 : 994,059.75 = 994,059.75 : x
2. Step 2: Convert to fraction form
   663,402/994,059.75 = 994,059.75/x
3. Step 3: Cross multiply
   663,402x = 994,059.75 × 994,059.75
4. Step 4: Simplify right side
   663,402x = 988,154,786,570.06
5. Step 5: Solve for x
   x = 988,154,786,570.06/663,402
6. Step 6: Final answer
   x = 1,489,526.39