Finding the Third Proportional to 218,808 and 478,104

Step by Step Solution

1. Step 1: Write the proportion equation
   218,808 : 478,104 = 478,104 : x
2. Step 2: Convert to fraction form
   218,808/478,104 = 478,104/x
3. Step 3: Cross multiply
   218,808x = 478,104 × 478,104
4. Step 4: Simplify right side
   218,808x = 228,583,434,816
5. Step 5: Solve for x
   x = 228,583,434,816/218,808
6. Step 6: Final answer
   x = 1,044,675.86