Finding the Third Proportional to 90,430 and 197,056

Step by Step Solution

1. Step 1: Write the proportion equation
   90,430 : 197,056 = 197,056 : x
2. Step 2: Convert to fraction form
   90,430/197,056 = 197,056/x
3. Step 3: Cross multiply
   90,430x = 197,056 × 197,056
4. Step 4: Simplify right side
   90,430x = 38,831,067,136
5. Step 5: Solve for x
   x = 38,831,067,136/90,430
6. Step 6: Final answer
   x = 429,404.70