Finding the Third Proportional to 242,138 and 478,066

Step by Step Solution

1. Step 1: Write the proportion equation
   242,138 : 478,066 = 478,066 : x
2. Step 2: Convert to fraction form
   242,138/478,066 = 478,066/x
3. Step 3: Cross multiply
   242,138x = 478,066 × 478,066
4. Step 4: Simplify right side
   242,138x = 228,547,100,356
5. Step 5: Solve for x
   x = 228,547,100,356/242,138
6. Step 6: Final answer
   x = 943,871.26