Finding the Third Proportional to 218,754 and 478,656

Step by Step Solution

1. Step 1: Write the proportion equation
   218,754 : 478,656 = 478,656 : x
2. Step 2: Convert to fraction form
   218,754/478,656 = 478,656/x
3. Step 3: Cross multiply
   218,754x = 478,656 × 478,656
4. Step 4: Simplify right side
   218,754x = 229,111,566,336
5. Step 5: Solve for x
   x = 229,111,566,336/218,754
6. Step 6: Final answer
   x = 1,047,348.01