Finding the Third Proportional to 663,422 and 994,090.50

Step by Step Solution

1. Step 1: Write the proportion equation
   663,422 : 994,090.50 = 994,090.50 : x
2. Step 2: Convert to fraction form
   663,422/994,090.50 = 994,090.50/x
3. Step 3: Cross multiply
   663,422x = 994,090.50 × 994,090.50
4. Step 4: Simplify right side
   663,422x = 988,215,922,190.25
5. Step 5: Solve for x
   x = 988,215,922,190.25/663,422
6. Step 6: Final answer
   x = 1,489,573.64