Finding the Third Proportional to 199,422 and 428,076

Step by Step Solution

1. Step 1: Write the proportion equation
   199,422 : 428,076 = 428,076 : x
2. Step 2: Convert to fraction form
   199,422/428,076 = 428,076/x
3. Step 3: Cross multiply
   199,422x = 428,076 × 428,076
4. Step 4: Simplify right side
   199,422x = 183,249,061,776
5. Step 5: Solve for x
   x = 183,249,061,776/199,422
6. Step 6: Final answer
   x = 918,900.93