Finding the Third Proportional to 218,358 and 477,448

Step by Step Solution

1. Step 1: Write the proportion equation
   218,358 : 477,448 = 477,448 : x
2. Step 2: Convert to fraction form
   218,358/477,448 = 477,448/x
3. Step 3: Cross multiply
   218,358x = 477,448 × 477,448
4. Step 4: Simplify right side
   218,358x = 227,956,592,704
5. Step 5: Solve for x
   x = 227,956,592,704/218,358
6. Step 6: Final answer
   x = 1,043,958.05