Finding the Third Proportional to 218,348 and 477,428

Step by Step Solution

1. Step 1: Write the proportion equation
   218,348 : 477,428 = 477,428 : x
2. Step 2: Convert to fraction form
   218,348/477,428 = 477,428/x
3. Step 3: Cross multiply
   218,348x = 477,428 × 477,428
4. Step 4: Simplify right side
   218,348x = 227,937,495,184
5. Step 5: Solve for x
   x = 227,937,495,184/218,348
6. Step 6: Final answer
   x = 1,043,918.40